I've mentioned this previously, but Blue Bayou. It's located within the Pirates of the Caribbean ride, and is all about the atmosphere. Crickets chirping, fireflies illuminating the passengers on the floats passing by... it's just a very Disney kind of place to have your dinner. If you want semi-fancy dining, I mean. My favourite cheap-o option is Tomorrowland's Plaza Restaurant. It's just a huge cafeteria type deal, so not much of that magical Disney atmosphere while eating your food, but the food is delicious! And cheap! And you can get things like pork buns shaped like Mickey's gloves.