Final Fantasy is my favorite, and it's the only JRPG series I like these days. Unless we're counting Kingdom Hearts as a JRPG series separate from FF, then I like that one as well, but I personally don't consider it a JRPG or entirely separate from the FF blitzkrieg.

It's a shame Lost Odyssey didn't turn into a series. That's the last non-FF JRPG that I really liked.