Our must do is we ALWAYS try at least one new sitdown restaurant. It's our "big adventure." DH and I each chose a new place for our January trip -- Narcoossee's and Boma -- and we ended up at the Plaza Restaurant one afternoon which was also new to us. All three were fantastic! We're not fussy, so decent service and good food will always win us over.
On our mother's day trip we're trying almost all places we've never been to -- Grand Floridian Cafe, Le Cellier for lunch (we've been for dinner but the menu is different), Jiko (I can't wait!!!), and Boma for breakfast (again, we've been for dinner but can't wait to experience the breakfast).
We have lots of favorites -- DH loves the honey sesame chicken at Nine Dragons, I must have a Dole Whip and Rice Cream on every trip. And if I could afford to, I'd have the chocolate souffle at Victoria & Albert's on every trip!