I don't have favs at DHS and AK, unfortunately. But, I do at MK, Epcot, and DTD.
Epcot - Agree with everyone that said Sunshine Seasons; I don't like to eat a lot of heavy food, and they have some really light options.
MK - Columbia Harbor House is really good, but again, I have to be in the mood for fried. But, if you are craving something like that, the fish'n'chips baskets are really good!
I haven't eaten there in a couple of trips, but Pecos Bill's is good, too! Hoping to go there again soon!
DTD - As others have said, WPE is fantastic. I've eaten at the actual restaurant on the other side of DTD, and well, it was very disappointing at best. Because of that experience, I was rather hesitant to try WPE but saw everyone on here raving about it. I went over one night last trip (stayed at SSR) for dinner, and have to agree with everyone else - it's great! I tried to go back again another night, but the line was a good hour long+ wait out the door!