You mean other than the obligatory Pokemon Black Version? =P
Well, I've been playing Metroid Prime 2: Echoes for the GameCube for the past few days, and I've really been enjoying it. Though I do have to admit, some parts of it annoyed me a little. In particular, prior to getting the Dark Suit, the 'Dark World' was pretty annoying to traverse, though I can respect that it was intended as such.
Besides, so long as you're in the light areas, you can regenerate energy!
Monster Hunter Freedom Unite for the PSP is another game I've been playing and having some fun with. Though I am only playing it solo, since I honestly don't really have anyone to play it with... ;-; lol
I'll be back later on in the week... xD