What's the theme of your Avatar's world? What song(s) would fit it?
By theme, I mean is it Magical? Fantasy? Historical? Sci-Fi? You know the gist of what I'm talking about.
For Aldrac's world, it's a Historical, Medieval Magic-Fantasy World. So Golden Brown by The Stranglers would be the best choice, especially the Slowed+Reverb version.
Let me of your worlds and their fitting music.