Now that I thought more about this question, the question should have been "Your favorite place to eat in each park?" I have places in each of the parks I like to eat at everytime we go.
Animal Kingdom: Chakarandi Chicken Shop - Chicken Satay, PIzzafari, Rainforest Cafe
Magic Kingdom: Crystal Palace, Harbor House, Tony's
Epcot: All of World Showcase, Sunshine Food Fair in the Land
MGM: 50's Primetime Cafe, Mama Melrose's