Playing Borderlands 2 co-op and having a blast. We just "finished" the game for the first time, and are heading straight on to the DLC and then probably new game +.
Been messing around with Skydrift (got it free through Gamersgate via their 4 for 3 thing). It's a nice little solo experience, though I wish the MP weren't neutered. My wife and I would be playing local MP non-stop if you could add AI opponents to the race.
Also, got Assassin's Creed 3 from my lovely wife yesterday and have been dabbling. I agree with others that the tutorial series is too long, but at least it's somewhat interesting. Then again, I'm a sucker for anything with historical trappings, no matter how far from reality it may veer.