as far as Breakfast...my absolute fave is Donald's Breakfastasaurus (sp.?) the food is great and the atmosphere is fun...also, you can make PS for really early before the park opens and you get escorted through.
Lunch...I love the Crystal Palace...Pooh and Friends circulate several times throughout the meal and the food is good...they also have a very nice childrens buffet set up...
Dinner...Chef Mickeys is a classic...fun, colorful, good food, a lot of characters...but if you have a girly girl...I think 1900 Park Fare has a Cinderella Gang dinner...I'm not sure about that one though...
The latest Disney Magazine had a whole article devoted to the buffets of WDW...you should check it out
Nicki