It seems like some people really like certain types/styles of music, and I know many times we've requested to be able to select certain music for certain areas, etc. I'd like to suggest yet another music idea of across game/Ur themes. We would be able chose in our account preferences to play a certain theme throughout the game, and it would persist for us. I for one love the original groddle theme, and would love to have different variations of the theme as I travel the world (or do quests). Some people love the dueling banjos, and others like the highlands music, and still others love the creepy bog music. Seems we're never satisfied. However, if we could have a variety of music (yea, lots more work for Danny) for each theme, where as I transition from the various regions the actual music would still change, but in the theme/music type/style that I've chosen. For example, if I chose the original groddle theme music in my preferences, I'd get snappy groddle throughout groddle island, rook quest/creepy groddle for bog areas, dreamy groddle for Ix, kiddie room groddle for Uralia, etc.
I'd think the themes could be something like:
Default - where the music is as it is currently
Original Groddle theme
Dueling Banjos theme
Highlands theme
Creepy bog theme
Ix theme
Ancestral theme
etc.