Okay, pet peeves time.
Things that should die:
On rails sequences in shooters - Fuck this
Grenades that barely explode - fucking irritating
Nuclear grenades - just as bad
Rocket launchers - just fucking gay
Maniacly laughing villains - stupid
Corpse runs - lame
Improbably large tits - get your porn out of my game
Improbably large swords - trying too hard
AI that cheats - fuck you
AI that's actually just A - lame
Multiplayer that's all pros - no fun
Multiplayer that's all n00bs - actually, that's a lot of fun
Racing games - they all suck
Systemwhoring games with mediocre graphics - fuck you, devs
Games released that don't work - explain again how this isn't grounds for a lawsuit?
FPSs where you have a really lame melee attack and there's a ton of melee enemies who charge you and kill you in one hit
Defense/siege levels - cop-out
Cinematics every 30 seconds - I wanna play
No cinematics, ever - Where am I going, again?
Really long open sequences with bad narration - no fun
Ragdoll physics in which the world is made of styrofoam - gay
Games where everyone acts like your character is a badass despite him not doing shit/games where everyone ignores the fact that your character just saved the fucking world
Games where the shotgun is underpowered
Games where pistols don't kill shit - I think desert eagles are known for "killing shit"
Games where a grenade can blow everything in the room around, but the furniture remains in place etc - indestructible worlds with havok physics = lame
Anyone else wanna list some?