Counter service in the parks? World Showcase has several places that are quite nice. Germany's Sommerfest offers bratwurst and potoato salad or kraut and a nice roll, there is a hot dog version, a chicken scnitzel and a couple other choices.
Japan's Yaki Tori house is good, especially the udon noodle soup.
France's bakery has ham and cheese croissants, among other nice choices.
Norway offers open faced sandwiches in their bakery and some wonderful sweet selections.
The Cantina in Mexico has a really nice selection for a counter service place.
I don't care for the food in China, but there is a counter service here too.
Morocco has a great counter service restaurant. Several choices and some wonderful desserts!
Canada does not have a counter service restaurant, only a kiosk with beaver tails (fried dough) and popcorn.
UK has the Rose and Crown pub food, and the Fish and Chips Kiosk.
US has only counter food. Standard hot dogs, hamburgers (cheese) tossed salad, grilled chicken salad, etc.
Future World has the Sunshine Food Fair in the Land, the Electric Umbrella, Fountainview Cafe and a place in the Body Wars pavilion.
Many good choices at EPCOT.
Columbia House in the MK is nice. Many folks like the hot dogs at Casey's. There is Pinnochio's Village Haus, ok as is Pecos Bill's.
MGM has a few, but I don't generally eat in this park.
AK, I like Tusker's. They have a pretty decent selection and it offers something other than the ever present hot dogs and burgers.