[barnstenchfartface]

Mega Ulorder would be my favorite if it could say more than like five words. Alas.

The Gaim sounds are my favorite, even if the actual jingles don't come from the belts themselves.

edit: or wait are we talking specific sounds? Probably like...man, that's pretty tough. I dunno. Right off the top of my head...Ghost Driver's OOO jingle? One of many favorites I suppose.