I don't own a Vita, but I've been very pleased with the RPGs on the 3DS so far. Shin Megami Tensei IV, Tales of the Abyss, Bravely Default, and Fire Emblem Awakening have eaten up way too much of my time (80-100 hours each). There's also Pokemon if you're interested in that, and full backwards compatibility with the DS's huge RPG library.
More recently, I've been having a fun time with Bravely Default. I highly recommend it, if you're looking for a turn-based RPG. The fighting system is fun, the story is interesting, and the grinding is really streamlined. If you're unsure, there's a great demo on the eShop, it's what pushed me over.

NNID: Zephyr25 / PSN: Zephyr--25 / Switch: SW-4450-3680-7334







