You can reserve all restaurants direct with Disney: disneyworld.disney.go.com/reservations/dining/
roughtyping - DD is 10y. In Disney terms that means she is an adult and pays adult prices, well at ones you reserve anyway - as they know their age - and especially for all you can eat buffet style.
For character dining DD still enjoyed the breakfast buffet at Tusker House in Animal Kingdom.
Non character:
Hollywood Studios - Prime Time - 50s style restaurant where they are all in character; you get "told off" (adults especially for not eating veg, elbows on tables, etc. Good fun; DD loves it.
Hollywood Studios - Sci Fi Dine-in Diner - if you reserve you get to sit as if you are in a car at a drive in. We didn't reserve so sat on one of the "space" tables round the edges. DD enjoyed the idea of the cars; and we enjoyed the food and it was novel.
Epcot - we ate at Chef de France; you get to meet Remy who comes out on a trolley hidden beneath a serving dish.
TBH there are lots of nice places to eat in Epcot at the World Showcase; you can check prices and menus on the apps.
Animal Kingdom - wee breakfast plus DD likes Rainforest Cafe too.
We also ate at T Rex this time at Downtown Disney - very similar to Rainforest Cafe but dinosaurs. very noisy!
At Universal we ate at the Three Broomsticks in Wizarding World of Harry Potter as DD is a huge fan and likes the butterbeer. In City Walk we ate at Hard Rock Cafe and Bubba Gump.