Recently, a good amount of people have been criticizing and cutting down Metroid: Other M. This argument often comes from fans of the Metroid Prime series. Funny enough, i'll be using content of other metroid games and popular titles to knock out these arguments. Basically, if you want to stick to your arguments, you have to play fair and point them to any game that does the same as Other M. What are the subjects of their complaints and arguments?

1.) Samus' monologues (and giving her a voice).

2.) Samus' reaction to "The Mystery Creature"

3.) Wii motion controls.

4.) Alleged Plot-holes.

5.) Samus' zero suit.

6.) Adam's Authorization System.

I'm going to simply throw each and every one of these complaints in the trash.

1.) Samus' monologues.

Samus is a very vocal character. Pop your copy of super metroid into the SNES and give it a whirl. What happens? You have roughly a 5 minute chunk of monologue explaining Samus' previous missions. Super is possibly the very PINNACLE of the metroid series. Everything in this game is extremely important to take into account, as any metroid game after it was put to it's benchmark. How can 5 minutes of dialogue be anything close to Other M? Simply put, Sakamoto's goal in the making of this game was to depict a story with gameplay. Their efforts were a success, but despite that, Samus still talked a ton (and not only that, there was a clip of her voice, being "The last metroid is in captivity. The galaxy is at peace.").

Next, grab the "next" game that was made. Metroid Fusion. Ever play Fusion? Chances are that if you even played a small amount of the game, you would find near endless gabbing about Adam and Samus' missions. That being said, there is no question that Samus' monologues more than the Prime series, and the limitations of the first 2 games were able to depict. (My guess is that the prime series, being made by retro, was made as a FPS first, and a story last. The scan system of these games tells the story- Samus stays fairly quiet.)

So two of the metroids have a bunch of monologue. That's enough to support that Samus gabs her head off, and there's nothing wrong with that. If you want to bash Other M for monologue, in the end, you need to also hate fusion and Super for it too.

2.) Samus' reaction to the "Mystery Creature".

*****WARNING. SPOILERS.******

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Often, this is the most common, most relentless argument people have to bash Other M. The fact that someone as merciless and experienced as Samus couldn't possibly react the way she does in Other M. Could she? Perhaps people are taking the Prime series far too seriously. They are canonical, but they are also focused much more on Samus' mission than Samus. Pay special attention to the way that Samus reacts to Ridley in Prime 1. Does she look to Ridley with anger, or with fear? When replaying this game for something like an 8th time, I realised that her expression is a -fearful- one. Not only does her facial expression change, but during a countdown to detonation, she STANDS THERE, STARING at Ridley for what seems to be a GOOD while. From what the game shows, she stares long enough that she makes it out with SECONDS to spare!
Super Metroid follows suit. You see Ridley, and you don't pump pellets at him until you've looked at him for a good second or two. (This may be limitations of the game, but I would argue that it is purposefully done.) This takes another blow at Prime 1 and Super if you maintain the argument of Samus -not- reacting to Ridley at sight.
Let's also consider PTSD. Having family affected by PTSD, it is not uncommon for the subject of the disorder to react at strange times. Some victims react to different triggers, some at different times, though given the same trigger each time. Samus may react more emotionally to the dragon-pirate that killed her parents after assuming he was dead than seeing him for the first time, which to our knowledge, is not specifically easy for a NES to exemplify.  These arguments take care of Prime 1 and again, take a knick out of Super.

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3.) Wii Motion Controls (Not using point and shoot, or the nunchuck, and first person mode)

This argument is just SILLY. How many wii games came out and USE the wiimote? How many of them receive complaints? Twilight Princess, being an amazing game on the Gamecube, was horribly reviewed by word of mouth on the Wii for it's use of wiimote. Prime 3 is the PRIME example. (haha)
Metroid Prime 3 is TERRIBLE for using the Wiimote on without experience (in my opinion, quite fun, though difficult!). Anyone who has played Prime 3 knows that free range shooting with a pointing mechanism is HARD. Nintendo focuses on FUN more than HARD and for those who enjoy HARD, they generally make a second option for gluttons for punishment.

First person mode is possibly the more common of the two arguments under this subject. People complain its too hard to use the missiles. My response: Do you think its easy for Samus to load missiles? Either way, this argument is a load of crap. First person is RARELY required for any fast paced fighting, and often a second means to the same end. Mystery Creature (2) can be fought without use of missiles, and it's the hardest of the bosses! I'd much rather pick on Prime 3 for hyper mode. Accessing it and using it is a pain, and on higher difficulties, it might screw you over or save your life. But in the end, THATS THE POINT. With power comes RISK! That gives Prime 3 another dent, and entirely destroys Zelda TP for the wii, and other unmentioned Wii games.

4.) Alleged Plot Holes.

Another silly argument. It's a video game! So what if morph ball is humanly impossible! It's been the SAME in every Metroid! Who leaves missiles only compatible with chozo-based tech on random planets? No one. In any case, if the Chozo had done so, do you think the space pirates would leave them be? But without our powerups, Metroid would lack gameplay. How can a dragon survive 3 planets blowing up, and be mechanically enhanced and chemically changed just to come back later perfectly organic and normal? How can a brain in a jar function as a computer? I can go on forever. EVERY Metroid has these "plot holes" that are just stupid to question. If you hit Other M for it, you hit every game for it. So throw away your game collection, especially Metroid and Zelda.

5.) Samus' Zero suit.

I won't go into too much detail on this one. Simply put, it is fan service. That being said, Samus is in a tight latex suit for mobility's sake. As for the heels- Does anyone own a powersuit? Can anyone tell me where all the switches and triggers are located? For all we know, the bottom of the heel could fit into a part of her suit that engages a higher jump, or enables greater mobility, speed, or balance. Samus jumps MUCH higher than humanly possible, runs faster than possible, and maintains balance in some pretty sketch places.  So what if it makes Samus attractive. She's a woman, and women generally enjoy dressing to impress. In any case, I highly doubt that a bikini is much better for Samus to wear as underarmor.

6.) Adam's Authorization System.

Imagine, if you will, an empty room the size of a gymnasium. Now put a large quantity of cardboard on the walls. Enough to cover the perimeter of the room. The room is guaranteed to be empty. No one but you.  Get out your machine gun, and let loose. Big deal, right? You did no bodily harm, and you had a little fun wrecking up the room. Now imagine that behind any given piece of cardboard there may be a human. Get out your machine gun, and let loose. Wait. Should you be shooting your machine gun at will when there is no confirmation of where people may be? Naturally, no. You must first be given the clear to shoot certain places.
This applies to the situation with Samus and Adam. Samus isn't on an uninhabited planet, able to unleash her guns any which way. Shes on a craft with living people. Samus realizes this, and allows Adam to dictate her use of power-ups. Not only this, but she also trusts Adam knows what he is doing. (as for the Varia powerup and space jump, which is not a gun, ill explain this in a moment!) Samus is under orders because she -needs- to be, as it's safety protocol.
This leaves us to the Varia suit and space jump. The Varia suit functions as one of the most game-changing items. Running through a hot room without it can be painful or even fatal. Why does Samus only activate it when Adam authorizes it? Quite honestly, this is unexplainable to a degree. If anything, Samus should have ENTERED the ship with the Varia suit. This, however, is, as mentioned, used to make a part of the game a little more challenging, and more fun. As if anyone can complain about having fun for the sake of story. If you wish to argue on the authorization system still, at least admit that this ability is the only one that can be argued is "silly." Storywise, the explanation is simple. Samus waits to use it on command because she trusts Adam understands the situation as well, or better than she does, and will not compromise her safety, or anyone elses, by causing electronic interference or using ineffective technology.
The authorization system, in the end, is a whole lot better than a Deus Ex Machina favoring the pirates due to a small explosion, or a lack of equipment under no reasoning given (such as in Prime 3, Metroid 2, and Fusion.)

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That being said, the bandwagon that tries to criticize Other M is just a group of ignorant people who may follow the opinion of others, or simply is just a critic because they didn't get a carbon copy of Super Metroid, or a Prime 4. Other M feels like a Metroid game moreso than the Prime games, and gives a good reputation to the franchise.

If you disagree, leave me a comment, be respectful, and document what you say. Keep in mind that this defense is not exhaustive.