Right now, playing Dragons' Crown on PS Vita and loving it. On my second playthrough, unlocked Hard difficulty. Just got Cytus Lambda (rhythm game) for the vita as well, nice if you're into jpop/eurobeat.
On PC, I recently finished Hotline Miami, and unlocked the secret ending (I actually prefer the mysterious unsolved original ending better). Before that, I was playing Sanctum 2, lots of fun. I hate to say it, but PC gaming has taken a bit of a backseat since getting the Vita. I still played Hotline Miami on the PC instead of the Vita despite having it on both, because the mouse and keyboard are still more natural to me, and the big screen and big sound really heightened the experience. But the Vita is just so accessible, and a joy to game on. Plus, the games I'm playing on it are mostly exclusive/console titles at the moment. Maybe Wasteland 2 or Project Zomboid (or DayZ) will break me out of this funk and get me back to PC gaming.
Games I plan to play over the holiday break include:
Persona 4 Golden
Tearaway (if it goes on sale over holiday break)
Wind, Sand and Stars.