I can't remember another soundtrack where I actually loved every single tune. I have the whole soundtrack and have listened to each song several times. It REALLY helps me write and get work done. It's a pretty vivid and varied group of music.
I'm gonna start playing Chrono Cross with my friends soon though...and it's looking like that just might take the cake. I've never played it before, but oh man, looks like a masterpiece.
That's some evocative stuff. I'm a fan of emotional music and atmospheric stuff more than anything, so my itunes and youtube playlists are pretty RPG heavy. Skyrim's ost has helped a lot with my homework lately.