If you enjoy in-depth RPGs, the remake of Chrono Trigger for the DS is really very good.
It's an amazing RPG which is superbly fun, from square waaaay long ago on the NES (I would personally rate it higher than FFVI (altho FFVII is higher than Trigger in my mind). I would, however, rate the sequel to Trigger--Chrono Cross--higher than FFVII)
It's got time traveling, robots, a frog, a cavewoman, magic, multiple endings depending on how you beat the game and how you start new game (+s), and other assorted awesome things.