I use to leave soundtracks in background while i work. So drop be any you considerate that i must listen while working!...
My favorites so far...
(NES)
G.I.Joe - The Atlantis Factor
Code Name: Viper
Contra / S Contra
Code Name: Viper
Double Dragon I,II,II
Dr.MARIO
(SNES)
T.M.N.T. IV
Super Off Road
F-ZERO
(GB)
Super Mario Land 2 & 3
Gradius
Kirby's Dreamland
there are more i like and listen but i wont listen all, so please fell free to recomend me any in these consoles or any other