Video game music

What is your favorite type of video game music?

Genre: Fighting, RPG, 2D shooters, old school...

Series:  Gradius, Castlevania, Street Fighter...

Type: Orchestrated, Vocals, Techno, Remix, Original...

Groups or composers:  Yasunori Mitsuda, Minibosses...

Systems: SNES, PC...

CDs or tracks:  FFIV Celtic Moon, Ultima 6 Battle theme...  

As far as fighting games go Guilty Gear has some fantastic music.  Never fails to get me pumped for a few hundred rounds.

In the realm of RPGs you can't beat Yasunori Mitsuda's work.  Xenogears was a fantastic game in part because of Mitsuda's music.
Lunar also had some great music that was really inspiring.