Are action RPGs okay? If so, Ys: Oath in Felghana. It's a remake of Ys III, which is also available on other platforms. However! The PSP version has features that other platforms do not, the main two being voice acting (other ports just have beeps when text is displayed) and a whole new mechanic, which is reminiscent of Final Fantasy's Limit Breaks.

One potential caveat, though: this is probably the hardest entry in the series. Fights are hard, but never cheap. If you're okay with that, you should have a good time.