Cool, it's actually pretty hard to even come up with a list of 10 songs even though you know you know there's a lot more than that tuck in your head.
Personally, I think I find Star Wars: Knights of the Old Republic to have the best music of any game ever. In particular the 'Final Battle theme', which is a more elaborate and faster version of 'Darth Malak's theme'. It's so grand and epic, and perfectly suited for the duel with the Dark Lord. Also, the music playing on the Endar Spire and in some cutscenes featuring the Sith is very awesome as well.
Otherwise I think Zelda: The Wind Waker has a very good soundtrack. I'd say the game ranks last in pretty much every aspect compared to other 3D Zelda's, but it's music is definitely on top. 'Grandma's Theme', 'Goodbye Hyrule King' and the music during the end credits are all amazing.
