-I hate it when games incite you to create your own character (Dragon's Dogma, Mass Effect, Dragon Age, any other Western RPG, etc.) and you spend hours thinking it looks awesome and then you start playing and realize it looks like a monkey's butt.
Annex: I hate the fact that no matter how customizable your character's physical traits are, the graphics still don't make me think this would be a real person. I mean, I don't want my character to come out of the screen and gimme a kiss or something. And I know it depends on the engine and cutscene limitations and all. But it just bugs me that I'm destined to customize my character so that he ends up looking like a butt face.
-PS3 only, I guess: I hate the fact that whenever I'm gonna save my progress, it immediately assumes I want a separate file from the one I've been using throughout the game. MGS4 did that a lot and I actually have at least 5 saved files, all of them are the same story and all but the game never assumed maybe, just maybe, I DO want to overwrite my old file by default!
-PS3 only #2: UPDATES! Really?! I have 30 minutes to play before going to work and I suddenly need yet ANOTHER update that will take around...oh, 28 minutes. Oh, and you can't do anything else while it updates.
-I hate that you can't be a good sniper because real-motion. I know this can be turned off for some games. But those who force you to either snipe fast or take the wind into consideration or your breathing rate or whatever just drive me nuts. Just let me kill the guy with one simple shot and make me feel empowered, dammit!
-Shaky camera. Must we have it for every single action cutscene? I can't really tell what's going on! Curse you, Blair Witch!
-Teams that don't know there is no I in Team. I've been playing Gotham City Impostors a lot lately and the few times our team sticks together, we kick major butt. But when I get a team that scatters or steals your kill or run away from you then that's a sad day. Because we lose. Horribly. And humiliatingly.
-It's been said before but: Unskippable cutscenes. I've died 5 times and I've had to watch the same cutscene 5 times. Oh, don't worry. I'm sure each time I watch that cutscene, I love it even more than the last time.
-Also said before: Dumb tutorials, especially those who won't let you advance until you "press X to attack" and "Use your analog stick to look around". Also, those tutorials that try to explain every single element of the game while playing. That's good and all but I probably could have figured out on my own that X lets you jump and Start pauses the game and brings up the menu. Egoraptor can explain this better than me. This is why I hated the latest Ratchet and Clank game, as much as I love that saga.
Corollary: Tutorials that explain what you need to do either very vaguely or for only 3 seconds. Up until today, I never figured out how to make charcoal on Minecraft because of this. Yeah, I'm too lazy to google it.
-Tiny font. Seriously, developers. There are still people out there with 32 in. SDTVs out there. Believe me, it's not a myth. We also like to play games, by the way. Also, not a rumor.
"Oh, you're carrying 299 items? That's fine, you are free to climb the highest mountain and brawl the most ferocious dragon. What's that? You wanna pick up that feather? But that would mean you'd have 300 items. Nope, no can do, sir. You gotta get rid of something because clearly you can't carry all that stuff. That's nonsense and unrealistic. Pfffbh."