The music in Persona 3/FES is very awesome, my favorite song is the Battle Hymn for the Soul, the ending boss fight if you chose to fight him, because it is what I really expected in a boss fight, I don't say that much other than Other World in FF X, it just has the right mood in it just to beat the shit out of the last boss, its awesome. Another one of my favorite is the opening for the FES version, its just one of those openings that make me want to play the game and experience what the game has to offer.