We agree with you and rarely want to have a long sit down meal:
MK: Columbia Harbor House
AK: Yak and Yeti food cafe
HS: not too good of a choice here, but we usually eat at The Commissary. The food is actually a lot better than it used to be.
Epcot: The fish and chips place in England (can't remember the name)
for resorts: all time favorite is the Mill at POR, lots of variety and good food.