I know it's not that popular, but my favorite is the Prime Time Cafe in MGM. It's so much fun - I think the food is good (S'mores for dessert!) and you get light up ice cubes in your drink!
When we don't have any specific plans or PS's we ususally end up at the ESPN club DH's favorite place. So, I chose Epcot/Epcot resorts. However, once we get our AP's with the new discount, I'm sure we'll be taking in more of the Epcot restaurants.