I love the atmosphere at Crystal Palace, and who doesn't love Pooh & Friends? So that's my #1.
Close 2nd is 'Ohana, although I don't give a fig for Lilo & Stitch. The food is fabulous and the atmosphere can't be beat.
My family like Chef Mickey's better than I did. Too noisy, too chaotic, buffet tables were a bit sloppy. But you do get the Big Cheese himself, which may be why this place is so popular.
Haven't done 1900 Park Fare so can't comment.