Hmm. I like these kind of threads.
For me,
- TES3: Morrowind, when I hear the intro music, I just want to play it.
http://www.youtube.com/watch?v=z_7n16vh79k
http://www.youtube.com/watch?v=20QQvrF8hjw (from 3:06 especially, best ingame backgroung music ever)
- Final Fantasy VI, Nobuo Uematsu is a god.
http://www.youtube.com/watch?v=8-78iR-sXXQ (Kefka-best villain ever)
http://www.youtube.com/watch?v=joRZL671Esk
- Castlevania: Symphony of the Night; Epic game, epic soundtrack.
http://www.youtube.com/watch?v=Y3yXAMiFgyI (perfect rendition of a great song)
http://www.youtube.com/watch?v=IwuUyIph4Ok
http://www.youtube.com/watch?v=BLOcT25ph9k
http://www.youtube.com/watch?v=2RqGeEsXJWY (the chills, the chills!)
Actually, almost every song from SOTN is superb.
Of course, who could forget the old classics, where I'd like to include Sonic: The Hedgehog as a special entry, just because those songs are burned in my ears for probably forever. And that's not a bad thing either
Ooooh! And how could I forget Monkey Island?? Especially from the second game.