Isn't it just amazing all the different "layers" of entertaining things there are at WDW. People usually focus on the rides, some of the shows, landscaping (especially in Epcot) some meet and greets, etc. Then there's the music playing in the background . . . it has a subliminal effect on us all. The music contributes so much to the overall experience, and it's easy to forget sometimes, just how much of an impact it makes.
I think some of my favorite background music has to go back to my first trip to WDW, in the mid-80s, with my mother. I recall one evening we were walking past Spaceship Earth, and I heard that incredible space-age sounding, background music. Between the dark nighttime sky and the twinkling lights as we headed for the exits, I felt like I was walking along in another galaxy!!