Well, not exactly. It depends how good or how bad mood I currently have, but also what I'm listening to. For example, when I was drawing "The angry-angry-angry High Elf", I had veeery good mood (btw, I still have that good mood^^), but I was listening to Metallica's songs . And the Sad seraphim... hmm... ah, yes, The Rasmus' Funeral Song
Of course, I don't listen to music all the time. But almost always when I'm drawing, I'm also listening.
Sometimes I "know" the moods of my drawing, especially when I'm really happy, really angry or really sad. That's all.