I have stayed at many and my favorite is Fort Wilderness because everytime you go on vaction the secenary is always changing. Wether you stay in a cabin or not. Plus transportation to Mk is quick and easy and they have buses to all other parks.
Here is a list of where I have stayed and my thoughts about them: Polynesian - My All-Time Favorite, Can't say enough about it. Contemporary - As long as you are in the tower, it's great. New rooms look AWESOME!!! Grand Floridian - Too high class for me but VERY beautiful Wilderness Lodge - Great place, but for money I want the Monorail Carribbean Beach - Too spread out but nice Corinado Springs - Too spread out but nicer then Carribbean All-Star Music - Not even worth it when you have stayed at all of the above.
Of all of the others I would have to say that my favorite resort that I haven't yet stayed at would be Boardwalk. I Love the theme and location and ease of getting around to all places.