Persona 3 has one of the better soundtracks I have heard in a game. All the music in that game was brilliantly done, and is pleasant to listen to in almost any setting at any time. I feel the same way for Persona 4. Both games used the same composer and had very laid back and casual music, as well as very pulsed and fast moving music. Final Fantasy is another franchise with great soundtracks. Granted, it was better when Nobuo Uematsu did the soundtracks himself, but the newest work for that series hasn't been too bad either.