Bought a lot more GBA games but the PSP is still my favorite system. Not making a list but here: MGS Peaece Walker and Portable ops, Ace Combat (played the living poop out of it), Daxter, God of War games, Mercury and God Eater were pretty awesome too.

Can't think of more now tbh and I think I missed out on a lot of RPGs. Any recommendations?

1. metal gear solid peace walker
2. persona 3 portable
3. digimon adventure (japan only)

valkyria chronicles 2 and the psp remake of tactics ogre are a must. persona 3 portable is as well (the predecessor to persona 4 golden on vita). i'm also a fan of half-minute hero, which is a game that pokes fun at the (j)rpg a little bit and essentially plays as a collection of micro-rpgs that are each 30 seconds long... a very good and wholly unique game (in other words, precisely the sort of game that got released on the psp late in its life).

You know if the psp is modded it is a pretty beastly good gba emulator? lovely screen on it too for gba games.

psp go = retro handheld heaven