Hate to say it, but you really need to have at least some basic japanese reading ability to get the most out of a Vita atm (luckily i do heh). There's some nice import games which are unlikely to be ported to NA/europe. The library of games available for sale NA atm is like less than half of that in japan.

If you can't read japanese, you can probably still play something like Project Diva f at least, which i highly recommend.

Recently

I'd love to see some reviews of them.

I'm curious about Monster Monpiece and Demon Gaze, expecially.

It really goes according to personal tastes, here, but, in my opinion:

Final Fantasy Crisis Core: you can't go wrong with this.

Star Ocean, both of them: I found those really boring and repetitive.

Valkyria Cronicles 2 was the big surprise for me, to the point that I even bought the first game for PS3. Not sure it's really an RPG, but it's excellent. Pehaps it takes some time to get interesting, you must be patient.

God Eater (burst or not): big disappointment, very childish atmosphere, weak plot. Perhaps it's to be played in collaborative mode to fully enjoy. Not really an RPG. But I know people who went crazy for it...

Ys Seven: very good, an action RPG with speed and muscles and a nice story.

Last Ranker: excellent, but you must know some Japanese.

As for the many other RPGs with a typical, classic turn based combat, I don't love them, not my genere.

How can 3 First person shooter flop in a rowMegavideogamer