I find my mood influences what I listen to. Something I like one day I may skip the next simply because I'm not in the right frame of mind for it. The days I feel like I could use music the most I often feel like I can't figure out exactly what it is I want to listen to, almost a burn out of all the songs I like.

Music can definitely influence moods though. I remember being at a fairly busy bar, but it was relatively tame. Until someone put about forty five minutes of Michael Jackson songs on. Some weren't amused, but the whole vibe shifted to some drunken dance party.