Personally, it's either akimbo shotguns or grenade launchers.

Nothing really

My own incompetence. I know I shouldn't sprint round corners, but walking is just so slow :( 

" My own incompetence. I know I shouldn't sprint round corners, but walking is just so slow :(  "

• Grenade launchers.
• How when I get shot my reticule goes up.
• The maps.

Awesome, more bitching threads.

When the kill-cam shows the guying spawning before he kills me.

" Awesome, more bitching threads. "

"

I know you said "biggest," which implies a single pet peeve, but I have a lot more than this.

"

I'm quite happy with the multiplayer.  Sure, akimbo shotguns are annoying, but a few deaths per round from them aren't going to make me angry at all.
 
Then again, I am very rarely angry about anything, so maybe it's just me.

People who hide in corners and wait for passers by.  The worst offenders are those who build their classes around it.

People who hide in corners and wait for passers by.  The worst offenders are those who build their classes around it, Ninja and Cold-Blooded with a silencer.  God I hate these people

Lag.

Probably the akimbo shotguns, and campers, throw in the moment when you don't see a hidden claymore and you have my list. 
 
Not encountered the javelin glitch yet, but that's getting sorted soon anyway.

I played a Domination Match the other night against a team full of Javelin glitchers. That got quite annoying, so I'll go with that. Anything else, like the Akimbo shotguns, is a fair part of the game.

• How when I get shot my reticule goes up.

That damn Javelin glitch.

people taking during the matches I hate that

" @Vinchenzo said:

• How when I get shot my reticule goes up.

This "

Akimbo 1887s + Marathon + Lightweight
 
Yeah...

How it seems when you are being shot you're aim going crazy, but the people you are shooting seem unaffected.
 
Also bouncing grenades from your launcher, JUST EXPLODE DAMMIT.

" Akimbo 1887s + Marathon + Lightweight  Yeah... "

When they sh*t on the carpet.

" When they sh*t on the carpet. "

People who spit in public.

Overcome and adapt.  Shoot them motherfuckers before they shoot you!

" Probably the akimbo shotguns, and campers, throw in the moment when you don't see a hidden claymore and you have my list.  Not encountered the javelin glitch yet, but that's getting sorted soon anyway. "

"

People who spit in public.

"

I have no problem with the idea of akimbo shotguns, but the range of those things can be ridiculous.  The problem with not being able to slow down someone rushing to knife you even if you shoot them is still an annoyance.  Other than that, i see no issues.  IW has given the user enough tools where the game is accessible for everyone (deathstreaks, thermal scopes, heartbeat sensors).  Some things look unbalanced now, but im sure it will get sorted out with future patches.

" @ImperiousRix said:

"

People who spit in public.

"

...In CoD, fool! "

the blood screen. 

"

People who spit in public.

"

Flash Grenades.ahhhhhhhhhhhhhhhhhhhhhhhh

" Akimbo 1887s + Marathon + Lightweight  Yeah... "

You guys.. 
 
 

" Lag. "

My impatience. I'm a sniper so I tend to stay at certain spots to cover my bud's flank (camp). At one point there's a time where I say to myself "The team is doing pretty swell. I mean we're 15 seconds into the match and my bud just steamrolled to get his predator missile......*30 seconds pass*.......fuck it". I start bolting to where the action is at and the first few steps I hear bullets firing in that ever friendly triplet pattern. *Dies* Mr. M16 just rolled into the flank I was covering.

• Recoil on ACOG scopes. There FUCKING USELESS.

Right now, I'm trying to get the sabatoge challenges done before I go into the second prestige so my biggest annoyance is that nearly all my teammates in every match don't even try to plant the bomb or prevent it from being planted.

The Javelin glitch.

" @Skye said:

" Awesome, more bitching threads. "

It's the games fault for having a fairly unbalanced multiplayer. "

" people taking during the matches I hate that "

Those damn Javelin seamen. The ruin the game, specially on Search & Destroy.

"My own incompetence. I know I shouldn't sprint round corners, but walking is just so slow :(  "

akimbo 1887s.  That's it really.

People who complain about the game then go on Xbox live and complain about the game while actually playing it.

people who dont completely dry there hands after going to the bathroom and make sure to make contact with you as soon as they get back.

" Personally, it's either akimbo shotguns or grenade launchers. "