RAGE!
First off, those cameras, why does every video game camera seem to have a scorn for my desire to look at things. I have fallen off too many a ledge in the recent Spyro titles thanks to the chimpanzee who programmed to camera.
The whiny, annoying, twats on XBL but that's a given at this point.
My biggest pet peeve is when the game freezes on me. Fallout 3 is particulary guilty of this. I was walking to Takoma Industrial when all of a sudden my game crashed. I was like "Oh, ok I had a save point from 5 minutes ago, I'll let my Xbox cool down and try again"
1 hour later
FREEZE! I got pissed off, one more attempt and FINALLY I got there. Apparently my game crashes if you take a certain route into Takoma Industrial. All I wanted was that "The Bigger they are.." achievement and the game freezes on me twice!? It's a good thing Fallout 3 such a kickass game or I wouldn't be able to except such bugginess.