Ohanas is the only one mentioned served family style instead of buffet. We like this style a lot when we have little kids (or mom doesn't eat, she just goes back and forth to the buffet). It also makes it a little easier to see characters, since you are not getting another helping of eggs when Goofy stops by your table.
(It isn't preplated, like Cindys. Its served in a large skillet set in the middle of your table from which your party helps themselves. Your server stops by and checks to keep the skillet full of eggs, sausage, etc. Last time I was there, they served a wonderful pineapple/coconut coffee cake in keeping with the Poly theme).
Cape May (where I haven't been) is rumored to have great food and be easiest to book last minute. Its at the BC, so a good deal if you are staying at the Epcot resorts or visiting MGM or Epcot that day, a little off the beaten path if you are staying somewhere else and going to MK.
GF also has great food (I went years ago - and it was decent, although not great). Convienent to MK resorts and the MK.
Chef Mickeys is the the most popular of the breakfasts you've listed, also convienent to MK resorts and the MK, but book this one earlier than the others.