maladroit didn't you say fft was like the best tactical game ever a few months ago?  i only played jeane d'arc for like AN HOUR and it was pretty alright but i think the fact that it is GAY ANIME VERSION OF JOAN OF ARC with gay anime story and voice acting and characters probably puts fft ahead of it.

Yeah, Final Fantasy Tactics is a better game by far man.  But as far as recommending a single PSP game that isn't a port and isn't a remake to someone who likes RPGs, I'd go for Jeanne d'Arc.  I assume that he's probably played FFT and Disgaea already and I really thought Jeanne d'Arc was spectacular!

EDIT: Or maybe Brave Story MAYBE.  It's a pretty good game but the dungeons are ridiculously dull.