Sonic 3D Blast (Genesis version) of Volcano Valley, particularly Stage 2, is my all time favorite music in ANY Sonic game. It's nice and slow, and sometimes, it makes me think of something sad. When I listened to this clip that my friend showed me long ago, it just blew me away. It was just so beautifully done. I loved every bit of it.
Hehe, I even made lyrics to the tune of this remix. Only one person heard me sing it. No one else is gonna hear it though, since many people believe these things are better instrumental. =P Oh well.