It doesn't get any less complicated than that. What video games do you really despise (or dislike) that everybody else in the world seems to like? An explanation is optional.
Here are mine:
Gears of War
World of Warcraft
Guitar Hero/Rock Band etc.
Diablo I & II
Most of the Tom Clancy games
Anything after GTA: Vice City
Most of the Medal of Honor games
Most of the Call of Duty games (up until Modern Warfare)
Yeah, I'd have to cast my lot for any FPS just for that reason... Except Goldeneye. For some reason, I still adore that game. ...And Portal... since no one's trying to shoot you in the back the whole game!
Assassin's Creed 2: The broken combat, The clumsy platforming, The endless grinding, The retarded voice acting, The repetitive missions, The bugs, The glitches, The game crashes, Well you get the idea...
Dead Space: IT'S NOT FUCKING SCARY!!! GET OVER IT!!! Oh and it's repetitive and boring...