Idk mostly the regular ones. Mega man, Castlevania, Sonic, Mario, Metroid, Zelda, Pokemon, Most RARE games (DK, BK, CBFD etc.). I remember how I sometimes put my Brawl disc on just to listen to the music a lot of years ago. The Fallout series has a lot of commercial songs but in good taste.
Also I have to voice my love for the Crazy Bus main theme on Genesis. It could be considered a series if you count all the released versions.