Mine are (sorry, too much good stuff to name just one):
Fatal Fury Special - Terry Bogard Theme
Just screams FF/SNK, eh.
Fatal Fury Special - Andy Bogard's Theme
Basically a waltz, 3/4 notation. Love the harmonium patch and arrangement with elements from French and Italian folk.
Real Bout Fatal Fury (Special) - Wolfgang Krauser's Theme ('Lacrimosa' from Mozart's
Requiem in D minor)
Mozart in a SNK fighter, and then it's one of my favs of his? To say that I was blown away when I first heard it is the understatement of the last century. Only on Neo, man, only on Neo. The Latin word lacrimosa means tearful. I'LL CHISEL YOUR GRAVESTONE, SLEEP WELL!
Real Bout Special CD Bonus - Blue Mary's Blues
Another jaw-dropper and a nice song to boot. Gotta luv me NGCD. The video linked above is a bit laggy but it has translated lyrics, that's why I picked it. Check out youtube for more versions of it.
.
.
.