Imperishable Night takes the cake. I don't understand why I'm like the only one - everything sounds so good. In addition, I feel many of the songs are really effective in setting the appropriate atmosphere, like the Stage 1 music (so dark, really fits the "night" theme) or Stage 6 music (feels like I'm flying into space). Although funnily enough, although I like pretty much all the in-game music, I don't like most of the non-gameplay songs (Title Screen, Credits, etc). Oh well, those tracks aren't very important to me.