Definitely have to throw out Lucifer's Call! The best RPG I've ever played (and replayed).

If you liked DDS, a few things to note. I feel that the story in SMTIII is better told and more interesting, but it's also much more "in the background" than DDS' story. It's much more event-driven rather than character-driven, although even on that note I think SMTIII has some of the best characters I've ever come across in the genre.

Also, the game is a lot harder and more open-ended, so just be prepared to have a rough time in spite of the similarities the two battle systems share.

I rarely have the time or inclination to replay games, and even when I try I usually get bored within hours. I've played SMTIII from start to finish a good four times, and I suspect more playthroughs lie in my future.