Wolfgang Puck Express is the best, by far. I just wish they had some of them inside the parks.
MK - Cosmic Ray's, primarily because of the ribs & chicken combo. I'll definitely have to try Columbia Harbor House next time.
EP - Sunshine Seasons is a good value. (Food samples during the Food & Wine Festival are awesome for snack credits!) I'd love to try some options in The World, but we only have three days in Epcot next time. We have ADRs for dinner on all three days and lunch one, and will be doing F&W snacks for lunch the other two.
AK - Flame Tree.
HS - Pizza Planet. We can't go anywhere else because of the kids (huge Toy Story fans).