I'd actually like the music to change depending on the zone. In the deserts of thanalan?

http://www.youtube.com/watch?v=K7J-xUx5jO4

Cruising around La noscea?

http://www.youtube.com/watch?v=tpBBQBAhajs

etc etc.

I'm a huge fan of games that have a living breathing soundtrack (Skyward swords bazaar in skyloft for anyone who wants an example)