By default, it goes to Mass Effect 3. Rayman Origins is second place.
They're the only two console games I've bought this year. Everything else that I've bought/played are things from last year and before. There's also a lot of Free to Play stuff that I've disqualified because technically I never bought them.
There's no set criteria for GOTY besides coming out that year, I know, but I'm trying to choose one. I'm doing what I can to cut down on my choices and reduce the chances of being flamed.
On that note, Troll Pick is: Frontline Tactics. Came out 4 days ago, already logged 16 hours. It's a nice little TBS game, kind of like an indie XCOM. You can find me making sweet internet love to the game on the steam forums, chatting up the devs (They've really been vocal and visible, posting in damn near every thread asking for suggestions for improvement and thanking people for playing)