The two best RPGs are sadly Japan-only at the moment. These are
Tengai Makyou 4 and Brave Story. Both are incredible games.
Popolocrois PSP is OK, but the original Popo 1 and 2 on the JP PSOne are much, much better. It's a shame Sony messed up the remake. Tengai Makyou 4, in comparison, is a remake of the Sega Saturn classic but it's actually BETTER than the original, with added anime cinemas and quests.