OK, here's something to think about. Does the music we listen to change our mood, or does our mood dictate what music we want to listen to? Or is it a bit of both?
For example, while writing this Im listening to The Bluetones and their album "Science & Nature". I didn't choose to listen to it, I just hit random on my MP3 player and up it popped. When I listen to the Bluetones, it puts me in the mood to start writing my own songs again, but also in the mood of performing them... I mean, I love singing along to Bluetones songs because I have a similar pitch in voice and (I think) I sing them quite well. So now, all I wanna do is go home and start playing guitar, singing, maybe writing some stuff. There's an obvious case of music dictating mood.
The other day, however, I was not in the best of moods, and when I arrived at work all I wanted to do was listen to bands like Disturbed, Drowning Pool, Skindred etc. I was in an angry, shouty, growly mood and these songs fit perfectly... but then those songs perpetuated my mood which meant hapless user gimps who wanted help got their heads bitten off... so there is a case of mood dicating music, but also music dictating mood!
Im not too sure where Im going with this post, I think I just wanted to start you all thinking about your own music tastes and how they effect / are effected by your moods... you can tell, its a SLOW day at my desk today...