I do not know how old your kids are, but here are some things our family enjoys:
Character Meal: Garden Grill (served family style so no running around to buffets but all you can eat for my bottomless teenagers). This dinner is in a rotating restaurant, which is kind of cool for the kids and overlooks "The Land" river ride which is neat. In addition you get to see Mickey and Chip and Dale in Farmer Gear. We have done all the character meals now and this one has some of the best interaction. The food is a little on the boring side, but nice comfort food.
Magic Kingdom: Liberty Tree for lunch. The lunch service is off a menu so everyone gets to pick and we find the food much better at lunch. My hubby loves the pot roast and the ooey gooey toffee cake is as good as the name implies. It is a nice quiet and restful spot in the middle of the Magic Kingdom with wonderful food. The Declaration Salad is one of my favorites!
DHS: Book a Fantasmic Dinner Package at Mama Melrose. You get reserved seats for the Fantasmic show and the Italian food is decent. This is NOT great Italian, as the Italian family members will heartily proclaim, but we have had good food with some excellent servers here.
Animal Kingdom Area resort: Boma had some kicking soups and I adore their salmon. Desserts were astonishing. The only down side is that it is LOUD in there.
I LOVE Sci-Fi but the seating is in faux convertible cars, and everyone is pointed the same direction. There are limited opportunities to converse and it is hard if you have little ones who need help with their meal.
T-Rex is fun, but we found the food here to be sub-par on each visit. There were too many things which were room temperature which should have been either hot or cold. The service was lackluster at each visit with drinks sitting empty for most of the meal and uncleared plates from the appetizer taking up needed table space. The restaurant itself was really amazing to see, but as a restaurant it does not get our family double thumbs up.
Edited to Add: 1900 Park Fare for dinner is a HOOT! The Wicked Step-Mother, Lady Tremaine, is hilarious as are her two daughters. Cindy and Prince Charming are as lovely as the picture they will pose for with you. The food is decent and the Grand Floridian is beautiful to visit.