I do have to say Mythos really. It just feels magical inside there, the food is great and the view across to Marvel at night is really special. However, second place goes to Croissant Moon - for some reason it's the place I always think of when a daydream of "wish I was in Orlando" strikes me. It just represents the whole park to me. I can picture it now - wandering in at 11 ish, grabbing a cherry danish and milkshake, and sitting outside by the little wall listening to the POE music, watching the people, spying a look at Hulk over the rooftops, and flicking the flies away from my food
Ah, bliss.