The only RPG I've played on Vita is Child of Light and I highly recommend it, especially if it goes on sale over the holidays. At first it was cool, then the charm briefly wore off, until shortly after I got so hooked on the combat, gem crafting and collectibles. Gorgeous artwork and one of those RPG soundtracks that stay in your head for a long time. It's also among the multiplatform games that just look and play like they were made specifically for the Vita. Decent touch input, too.

I'm probably going to get the Ys game they released and will get the new one when it releases next year. I also bought Freedom Wars, a monster-hunter-like but haven't started it yet.