First of all, there is the theming. The attention to detail, the aromas, the total immersion that makes you think you really are in the South Pacific, or New England, or Yellowstone, or Africa. Have you ever been somewhere in your daily life and said "It smells like Disney here!" Their use of sightlines to either highlight or hide things so you stay in the bubble instead of going to your room and having a view of the interstate.
Then there are the things all the Disney resorts have in common, like the transportation, the gift shops, the toiletries, the CM's (good and bad), and the TV channels (whether you're a Stacy lover, or just like the music on the info channel). It doesn't matter which Disney resort you are in, there are common elements that they all share and which we look forward to, which make us comfortable - like we've come home.
Although each resort is different, it's really hard to pick a favorite. To me, one doesn't say "Disney" any more than another. Although I have my favorite resorts (of which CR is one - even though a lot of people don't think it's "Disney" like), they are my favorites for reasons other than whether they feel "Disney" or not. I can feel as Disney in a FW cabin or campsite as I can at Poly, or WL, or Pop, or CR. It just "is". It's an intangible thing that is a combination of all the elements that surround you, but you know when it's there, and when it's not.