Not expecting a huge response, but I'll throw this out:

What is your favorite background music in all of WDW? This can also be ride BGM (usually queue music) as long as it's not the music played during the ride.

To me this si one of the many details that makes the "magic" in WDW. It sets a mood and carries the theming, but you hardly know it's there sometimes as it is part of the whole.

With that said, my favorite is the BGM in Tomorrowland followed closely by the music playing throughout the grounds at the Poly.

Your turn.