Obvious ones:
Lost: Via Domus - I refused to buy it unless I found it on the cheap, lo and behold I walked into a Blockbuster going out of business sale, 5 dollars.
Duke Nuke'em Forever - Not bad for a PS1 game ... I mean ... ugh, again, got it super cheap, 12 or 13 bucks
Earth Defense Force - Seriously have no clue what you guys are wanking to, horribly boring game
Too Human - oh god, what happened here? I never bought this, thank god!
Popular Ones:
All Call of Duty games
All Halos after 3
Gears of War 2/3
GTA IV DLC
LA Noire
Every Lego game after you understood the formula
Lost Planet games (more like Lost Camera? Lost Controls? Lost Fun?)
Dead Rising - so much potential
Burnout Paradise - Open World Racing ... WTF
Games I didn't hate or love, but I'm glad were made:
SFIV - It's ok, not my cup of tea, just glad Capcom is still making it
KOF13 (or whatever it's called now)
Tenchu - RIP, it wasn't that bad, can't someone helm a AAA version of this game?