Diablo 3.
If your answer isn't Diablo 3 or Torchlight 2 you should be ashamed of yourself.
I can agree with the Diablo 3 part, it's my most looked forward to game of the decade, not just of this year. But Torchlight 2? Unless they made a fairly serious overhaul to the loot, I'm not interested. It gets ridiculous when you find the same rare/set/unique items at 40 as you did when you were 10, just with the "Epic" moniker added to them. All but the joke items felt stilted and forced to me. On the other hand, I loved the joke sword I found(Don't even remember it's name anymore). It gave "Emo Damage" and all kinds of other hilarious modifiers. Also, quests were kinda redundant as well. Over-all, the original was a decent game, but it could have been a great game if they had just put forth a little bit more effort into it.