For me, music is a huge part of all Disney attractions, much like the role music plays in motion pictures. Have you ever muted a scary movie and discovered how less than frightening it actually is without the sound? Imagine the Psycho shower scene without the audio, or how about Jaws, and since we are talking about Disney on WDWmagic the scene in Aladdin when the cave of wonders appears out of the sand.
Disney has mastered the use of music to stir emotion and transport us from the real world to someplace truly magical, especially in the themeparks.
There are many Disney attractions that have the "goosebump factor" IMHO. Sweeping orchestral arrangements do the most for me. (The less "kids of the kingdom" style pop music the better).