Personally I get annoyed by noobs :( They pop out of everywhere!!!!!
I actually get very annoyed by the fat zombies. No joke... For example:
I am under fire by some commandos... so i fire back and take them out. Idiotically i fall back and reload in a dark hallway.
Let's just say I still have that wrench bruise on the back of my head.
I dont have the game yet (i will get it tomoworro), but i think the most doom 3 annoying creature is hellknights, I wasted lot of ammo on them in the old doom game before, and Im having a feeling, that im going to have another round with hellknights in Doom 3 when im going to get it.
Ok I just got to the place where you meet the lost souls and UGH I HATES THEM!