The grading for our family is a little different, all the parks are wonderful but the most important factor is our interactions with CM's and other guests. Based on that:
#1 is AK, by far the most wonderful experiences we have had are here
#2 is DS, best themed, wonderful shows and awesome staff
#3 is MK, close behind DS, CM's are great my daughters fav park
#4 is Epcot, not even on the map for awhile, some wonderful interactions with some CM's have caused it to move up a lot.
Anyone can build rides, but CM's make the magic.