If on the dining plan, would definitely recommend Wolfgang Puck Express at DTD.
Earl of Sandwich is another good one at DTD.
At Epcot we have tried and liked the Electric Umbrella, Sunshine Seasons, Mexico CS, and Fish-n-Chips in UK area.
The Studios is tough ... we usually go to the ABC Commissary.
At AK, we liked Yak & Yeti CS.
MK, we like Columbia Harbour House and Pecos Bill.
We've not tried all the CS so there may be some others; however, from those we have visited the above are one's I could recommend.