Agree we need more info to give you good advice.
Generics: CRT is very cool because you eat in the Castle itself but it is pricey; 2 credits on the dining plan. Crystal Palace is a buffet in the MK; all 3 meals are Pooh characters and the food at all 3 gets pretty good reviews. Chef Mickey's in the Contemporary is the only place where you can get the Fab 5 (Mickey, Minnie, Donald, Pluto, Goofy). If you have a little girl, Akershus in the Norway pavillion at Epcot is all princesses all the time. A couple of places have character breakfasts only. Hollywood and Vine - food is meh but the characters there often appear nowhere else, so do it only if the specific characters like Agent Oso are dealbreakers.