best videogame music ever:
http://www.youtube.com/watch?v=7ZX2N9_7NO8
gives me chills
overall metroid soundtracks are the bests i'd say
other than that, most videogames music i like for nostalgic reasons - like sonic 1 musics! scrap brain, green hill... those always remind me of my childhood, when i used to play them when i went at my grandma's for holidays.
kind of off topic, but if anyone wants danceable chiptune music, get truckasauras' album, it's amazing