We have have stayed at 4 resorts so far (a few repeat stays for a total of 7 trips).
Coronado Springs Resort
Port Orleans Riverside
All-Star Movies
All-Star Sports
POR is our favorite so far. And I would love to stay at every resort at least once, but we typically choose the resort based on what's the least expensive for our group size. I find the whole "renting points" thing confusing and more complicated than I care to get into for a vacation, and we probably won't ever buy into DVC, so those areas are off the table.
Yacht Club is at the top of my list for when the kids are all grown and DH and I go on a couples-only trip. It used to be Poly, but I changed my mind! LOL!