Golden Sun, Chrono Trigger, Final Fantasy VI...
when I think RPG I think games like these ones They're the nostalgic ones for me, I suppose. But I like most RPG's people have listed.

________________
Go to work, send your kids to school;
Follow fashion, act normal;
Walk on the pavement, watch T.V.;
Save for retirement, obey the law.
Repeat after me: I am free.

Valkyria Chronicles

Pokemon...but Final Fantasy is fun too.

I like FF tactics, FF tactics advance and Tactic Ogre (in general). I also enjoyed the gothic saga quite a bit, especially the first game.

I'm having problems choosing just one favorite. I'd have to say, from a purely entertainment standpoint, that Makai Kingdom would be my favorite.

The honorable mentions would be: Star Ocean 2, Chrono Trigger and Chrono Cross, Final Fantasy III, IV, VIII, IX, XII, and Tactics Advance, Dragon Quest III and VII, Disgaea 2, Dark Cloud 2, and Tales of Symphonia.