For 2010, I found that most of the my (pleasant) surprises were more attributed to the indie games - I've tried World of Goo, Braid, Osmos, Machinarium, etc. for the first time in 2010, and they were fantastic - much more in-tune, experimental, and "core" with what I've played in the past, evoking more of the "one more turn" feel than some of the over-produced interactive movies that are big-budget games coming out now (while impressive in their own right, the gameplay offered is becoming overly formulaic, IMO; and no, I didn't pick up SC2 or CIV5 . . . yet).
If it's talking outside of the PC/console categorization, what I can do with Kinect (really just play Dance Central w/ Mrs. Schadenfreude) and - more importantly and pertinent - what other people over the world have been doing with it just blows me out of the water.
I regularly scour the review sites and general consensus on forums (and I wait for game prices to drop generally) so I know better than to try some random hyped-up craptacular game - for the most part (RE5, I'm looking at you).