Shovel Knight (trying to do a no death no money spent all checkpoints broken run on new game +).
Deadpool (just completed actually).
Marvel vs Capcom 3 (I don't have an arcade stick so it's really hard).
Dragonball Z: Attack of the Saiyans (mmm that turn based).
Portal 2 (about damn time).
Playing a few indie gems right now:
The Binding of Isaac
Super Meat Boy
Castle Crashers
Love them all, but I think Binding of Isaac would have to be my favorite of the bunch. It's such a fun game and it never feels samey or uninspired. I'm terrible at it though. :P
Mario Kart Double Dash, which is my personal favorite Mario Kart game, what with character specific special items and the ability to double up on items. Not to mention some of the best course design in the series, only topped by Mario Kart 7 in my opinion. Screw 150 CC though... I mean, it still...
Kingdom Hearts Chain of Memories (a steaming dump on the name of what is an otherwise amazing series), Batman Arkham City (awesome so far, no other comic book to video game adaptation even compares), Borderlands 2 (though I've only just started it, I can already say that it is flippin' dope)...
I'm a ways into Fire Emblem: Path of Radiance right now and it is freaking amazing. I'm also at like the third chapter of Fire Emblem:Sword of Seals (in english, no less), which is cool but I'm not very good at it. Just today I started the original Paper Mario, Kirby 64, and Yoshi's Story. I'll...
I am currently playing three different games from the Kingdom Hearts series (diversity is difficult for me):
Re:Coded (after how awesome Days was I was expecting more of this one, but whatever)
KHII (100% this time)
Chain of Memories (can't find a level 9 map card anywhere and it is infuriating)