My "I know I'm in WDW now" music is the Innoventions loop. There is certainly better music in WDW but it gives me butterflies =) I try not to listen to it much at home so it doesn't lose that feeling.
Innoventions Plaza Loops 19 & 52 Min Versions
Future World Entrance Loop
Tommorowland Current Loop
Illumnations Preshow
Wonders of Life Loop
Universe of Energy Exterior Loop
YOUR Disney Resort Channel Music..(Smooth jazz version of Disney Songs)
The Christmas music they play at Animal Kingdom is fantastic. Also, I still find myself singing the Jammin' Jungle Parade song from DAK even though I haven't worked there in quite some time!!
HM,Spash ,Pirates and I love the line music on Sorin where they play the games in line,and back ground music at the Poly resort.I used to love the line outside music at RNR when they played other artists music other than Aerosmith (love Aerosmith) they would play George Harrison ,ACDC and other 80 music.
The old Living Seas area music was great, very relaxing. Anything from Horizons, naturally, and I also loved the many variations of "It's Fun to be Free" that made up the WOM area loop. The old JII area loops that combined "One Little Spark" and "Magic Journeys" never fail to bring a smile to my face, either.