I seem to waver between Epcot and MK, but I think due to the crowds always at MK that pushes Epcot slightly ahead for me. MK is classic, of course, but the crowds make it less enjoyable. I love the feel of Epcot, the fact that it is so spread out, and the atmosphere at night. Plus I love Illuminations the most. We saw HEA for the first time and it was a one and done for me. I loved Wishes and would see that multiple times a trip, but HEA didn't have that emotional factor for me.
Then it would be AK next and HS last. That might change once they finish up Toy Story and Star Wars lands, but HS is pretty bad right now. We only visited for half the day on our trip a few weeks ago. AK is definitely climbing the charts with Pandora being there!