Epcot is one that I probably spend the most time at. Its my wife and I's favorite park together. Every time we go there are some must do's. Spaceship Earth, Nemo, Journey Into Imagination, Test Track, and a trip around the World Showcase. We try to eat and DRINK something new every time we go but again there are a few places we try to get to each visit. My wifes must do is Mexico and China while mine is Germany and England. 6-9 hours is perfect for us.