I have a psp, and a xbox360, and a ps2.
One I already have are:
360 -
Spectral forces 3 - I like the game play, but the complete lack of a story kind of made me lose interest. I really mean there is no story in this game. You fight about 50 battles between the chat sequences, and even then there are about 3 sentences of talking before the next 50battles you have to fight.
PS2 -
Stella duce - I have not yet played it, just purchased it a few years ago.
Suikoden tactics - Good game, I enjoyed everything expect the geopanels.
Disgaea 1 and 2 - Love them.
Growlancer generations - good games. But just remakes of really old games.
Makai kingdom - Loved it.
Lapucelle - Was ok, enjoyed it but nothing to exciting.
PSP -
Spectral souls - This was the reason i got SF3 for the 360, I loved everything about this game. Possibly my favorite of the genre.
FF tactics - The game that got me into this genre. Really enjoyed it.