For my family, our absolute must do is Ohana's. If you mention Disney, my hubby will immediately talk about Ohana's My DD and I really enjoy it too, it is the one place we all agree we absolutely have to eat at.
gave up a reservation at Cali Grill for Jiko's last time -- I don't think I would do that again. Jiko's was nice, but for atmosphere + food + service, California Grill
We don't go to any restaurant everytime we visit, because we can drive over for the day. The restaurant we go to most often is Les Chefs de France. Our new favorite restaurant is Hollywood Brown Derby.
The one place we have always eaten at since Epcot opened was in Japan at the habatchi dining. The name has changed. but not the food, although back in the day the salad and soup were included.