Currently:

CoD: Black Ops MP
Fruit Ninja: Kinect (Awesome ))
UFC Personal Trainer (...but not as much as I should be!)

Canned:

Brink (was great fun but it's gone stale even with the DLC)
Crysis2 (enjoyed but now bored of it)
Bulletstorm (finished and enjoyed it
Portal2 (enjoyed and might get resurected for 1 missing Co-op achievement)