Playing an RPG where the first few hours involves a compulsory tutorial in which the most excitement you get is killing rats, or other vermin for 1xp each.
Starting RPG sequels with the same character who has forgotten EVERYTHING since last game (Thank you Black Isle for BG2, skipping both of these stages in one fell swoop.)
Games in which stealth is not possible, eg, when enemies have 360 sight range, or take a close range headshot from a silenced weapon, and DON'T DIE, but alert ALL OF THEIR BUDDIES, or in RPG's where the reward for sneaking up on someone for a silent melee attack is that you do a pathetically small damage bonus, and are promptly killed for not being a warrior or mage.
And people who are not spies in TF2, but stare at you and act suspiciously when you spycheck them, and make you waste time and ammo, when they could just show that they aren't a spy.