I thought 2010 was a weak gaming year, at least in regards of new releases that I tried..
So my list is pretty short,
Fallout NV (I've come to hate the gamebryo engine, but I liked the story and feel - so this is basically a 7/10, -2 for GB)
Mass Effect 2 (more streamlined and unfortunately more boring, but a good solid game 7/10)
Games I imagine could've beaten these two, if I'd played them:
Super Meat Boy
Red Dead Redemption
VVVVV
A personal kudos goes out to Minecraft though, for a game that managed to go a very unconventional route and still be a smashing succes.. oldschool fun.