Fake difficulty. I don't mind games where the challenge is fair. If I die because I screwed up, that's fair. I need to learn the game. What I can't stand is games where I lose either because of something that I have no way of preparing for, other than to know it is there (trial and error gameplay), or where I lose because the computer is just automatically better than me, and can cheat on a whim (Fuck you Shao Kahn and being able to just ignore knockback from any attack I do if you feel like it).
Edit: Oh, and escort missions if the only way to win is to protect someone who is either a total idiot who walks into every enemy, or has the approximate damage absorption of tissue paper. If an escort mission is done well, as in Resident Evil 4, that's fine.
Edit: Oh, and escort missions if the only way to win is to protect someone who is either a total idiot who walks into every enemy, or has the approximate damage absorption of tissue paper. If an escort mission is done well, as in Resident Evil 4, that's fine.