Eh, hmm. the greatest songs are obviously... :
Mt. Dedede Theme: http://uk.youtube.com/watch?v=itzhyb3T4D4
Legend of Zelda Main Theme : http://uk.youtube.com/watch?v=HfRCoLnwv8w
Tetris Type A : http://uk.youtube.com/watch?v=Gi_cpSJhzIE
Tetris Type B : http://uk.youtube.com/watch?v=GgMNVzGfjZU
In these four songs you will find enlightenment.