Super Mario Galaxy, got it used with a 20% off coupon. It's a really fun game (five years too late in saying that, I know)! Though I can totally see why I am a Sonic fan and not a Mario fan. For one thing, Mario has far too many reused elements. The series whores out nostalgia, to the point where classic elements redone in 3D aren't as special as when Sonic does it. Also, the speed the characters move at feels slow to me, and I don't like the life system of the classics. Galaxy with the 3/6 hit system is far more forgiving.
I'll stop complaining, it's a great game. Though I cannot see myself replaying levels like I do with Sonic games. They're sometimes too long and once I reach the goal I'm satisfied, not really needing to return to the stage. I'm with that with most Mario games. One playthrough is enough for me.
Also playing Mario & Sonic 2012 for review purposes. Won't type too much, but it's enjoyable. However, the series is showing it's age thanks to the Wii's SD graphics. London Party mode is really fun.