It needs more than that. I often hesitate to rank because my preference often varies by time and mood and setting. I might not dislike a song, but don't want it played when I want something mellow to fall asleep to, or when I'm happy or when I'm sad. Having a given song show up in one context might irritate me because it breaks the mood while I might love it another time.

A good recommendation system for music needs to take into account proximity in play order to other songs you've ranked when you rank it, and their tempo and genre, time of day, etc.