Final Fantasy XIII. While it wasn't terrible as such, I just don't think it really belongs under the FF banner. That game could have been called something completely different and I probably wouldn't have thought "Hmm, this reminds me of a Final Fantasy game".

I think that if they focused less on making it so visually appealing and added a bit more bulk to the story, maybe had a less stupid battle system (I REALLY don't like controlling just one character because the computer controlled one often doesn't do what you want - and how even if your other party members are on full health when you get KO'd it's still game over) and gave the characters a bit more depth and development then it would have been a much better game. I also hate how some bosses have a time limit on them when they have crazy amounts of health, crazy attacks and your party's attacks and healing abilities are pathetic. Maybe if levelling up worked a bit better I wouldn't think it as big of a deal, but... Eh.

I can only really enjoy the game if I pretend that it isn't an FF game.