If you're really talking DL and not WDW, head over to the DL board section of the DIS here - there are a lot of friendly people there to help with all kinds of questions.
If DL, I think the "all you can eat" restaurants are"
Plaza Inn character breakfast (fair food, great characters and a lot of them)
Whatever the name of the BBQ thing is in DL park (never been)
Storytellers character breakfast (calm, good food, okay characters)
Storytellers dinner (no characters, not a lot of variety, but good quality)
Goofy's Kitchen at DL hotel - this is the main hot spot for a character buffet (I think breakfast is better than dinner - a LOT of characters at both though)
You'll get a lot more DL opinions on the DL board here.