Sinistron/Violent Soldier (sixth level music is the best, doublekicks ftw!)
Neutopia I & II (boss themes sound especially good)
Sidearms (especially the Nemesis 10 battle track)
Ninja Spirit (a lot of people diss this soundtrack but I love it)
Time Cruise (all tracks are well-done)
The Legendary Axe II (the palace music is my favorite, though the first part of the final boss music is particularly haunting and cool)
Silent Debuggers (title track mainly, although the ending story track is pretty good too)
Dead Moon (every track, especially the final battle track)
For CD games, just about every non-redbook track in Ys I & II, and a few tracks in Vasteel. Oh yeah, and the "strategy screen" music in Exile.