2011 - Zelda Skyward Sword for me. Yeah it's got a few issues but for fun-factor alone it wins.
2012 - Xenoblade Chronicles is a blast so far. Only 7 or 8 hours in but if it keeps up this might be my GOTY already.
Shadows of the Damned, Captain America: Super Solider, Mass Effect 3, Warriors Orochi 3, Rayman Origins, DW Gundam 3, Alice: The Madness Returns, Sonic Generations, Uncharted 3, Portal 2, Batman: Arkham City, etc. The list could go on and on. Last year was a great year for games.
But I have to give a special mention to Nier. I know it came out a few years ago but I finally got around to completing it with all the endings this year. Amazing game, it's an experience that'll stick with me forever.