My list:
No More Heroes
Okami
Zack and Wiki
Wonderful 101
Fantasy Life
Luigi's Mansion 3DS
Bayonetta 1 & 2
I know there's probably people thinking "YOU BASTARD!" but I'd like to add that I'm not saying these are bad games. But I've noticed a trend... you get enough people on the internet saying, "Oh, poor (game x)! It's such a good game but nobody's buying it! People should buy it!" If I go against my better judgement and buy those games, I almost always regret it.
But if I already had a little spark of interest in the game beforehand, like Ghost Trick, Hotel Dusk, or Pikmin 3, I usually end up really enjoying the game.
My lesson has been to not let "game mourners" affect my purchasing habits. There are a LOT of game mourners here on Neogaf.