Fallout: New Vegas. Hours of fun, never really pisses you off, only singleplayer, but is great.
BC2's campaign is too piss poor to even think about getting a GoTY vote from me.
Black Ops is good, but there are still things that need to be patched; however, it does bring a lot of good things to the CoD series, and has both a good SP and MP.
However, that being said, by and far FO:NV. A game worthy of GoTY should be good at everything it does, and better than the competition. Other than glitches, that will hopefully be fixed, FO:NV is easily the best game this year. I do not regret buying it one bit.