PC--
Meritous, and a bit of Borderlands. I've gotten so tired of Left 4 Dead and Hat Fortress 2. Can't wait for Portal 2, maybe it'll give me some faith in Valve again.
360--
Ketsui Extra, ESPGaluda II Black Label, and Mushihime-sama Futari. Goddamn, I love arcade shoot-em-ups.
PSP--
Project Diva 2nd, and Rengoku: The Tower of Purgatory. The latter of which is a half-assed game at best, but I've completed/mastered its vastly-improved sequel, Rengoku II: The Stairway to H.E.A.V.E.N. so thoroughly, I'm starved for more Rengoku gameplay. That's my excuse, at least.
DS--
Mega Man Zero Collection (specifically, I just completed Mega Man Zero 4) and a little bit of Osu Tatakae Ouendan.
PS2--
Silent Hill 2, since Smiles wanted to watch someone play through a Silent Hill game. 4th or 5th time trudging through the game, and I know the puzzle-solving and backtracking will be annoying, but the story is so excellent that I don't care. It's something everyone should experience at least once, even if they're just watching it being played. Also, a little bit of Guilty Gear XX Accent Core. Smiles may deny it, but she's slowly getting better at the game. ^^
Wii--
A little bit of everything. Red Steel 2, Sin & Punishment: Star Successor, Castle of Shikigami III, and Metroid Prime: Trilogy.
Game Gear--
Recently picked up Sonic the Hedgehog and Sonic Triple Trouble. I played them each for about 10 minutes, just to try them out. Genesis Sonic is obviously better, but Triple Trouble has some pretty cool level designs and power-ups.