What PSP game(s) should I get?

[DragonLord]

Quite a bit different than what you named, but Jeanne d'Arc is probably the most addicting game I've played on the PSP yet...lol, I'll find myself playing it for 7-8 hours straight on weekends sometimes.

Disgaea is great on the PSP too.

I like Dungeon Siege: Throne of Agony too---sort of like a Baldur's Gate.