I ~LOVE~ the music in this game. What baffles my mind, is why there is so little of it.
Here is what I'd like to see:
*Every zone has it's own background soundtrack. Something that fits the environment, but is classic Star Wars.
*Give different quest areas a different background theme. For example, I go into spooky warehouse, play spooky warehouse theme; walk into an area in the middle of a war, play middle of a war theme.
*When I fight Gold+ mobs, play a battle theme. Mobs that would require a group should have an even better, adrenaline-pumping battle theme.
If you want an example, look at FFXI. For everything that game did wrong, it got the music absolutely right.