See also:
Best VGM 224 - http://www.youtube.com/watch?v=Mea-D-VFzck
Best VGM 511 - http://www.youtube.com/watch?v=mG9BcQEApoI
Best VGM 902 - http://www.youtube.com/watch?v=1DFIYMTnlzo

A collection of my favorite videogame music. Note that most of them are from games I played so I might miss some great ones from games I never played.

Nintendo DS
Castlevania: Dawn of Sorrow (2005)
Subterranean Hell
Michiru Yamane