Epcot is my favorite park, which is why I usually choose one of the Epcot resorts. I also choose to be at Epcot for my first day, and my last day. Future World has some of my VERY favorite attractions, such as: Soarin', Turtle Talk, Mission Space, Spaceship Earth, and Ellen's Energy Adventure.
All of these I do over and over again.
When the day is done at ANOTHER park, I like to go to my room, wash up, and then just end the night with a brief visit to Epcot, maybe with a walk to a few "countries", and some shopping.
It is almost like being my "home base".