We go in August, so many choices are based on A/C!
MK- BOG (with FP)- really nice QS meal. For example, I had quiche/salad, DD had pot roast with potatoes (not your typical QS meal). Also, free drink refill station- appreciated in the summer heat! Real silverware, neat atmosphere (we sat near falling rose petals; picture on wall flashed from 'prince to beast' every once in a while).
AK- Pizzafari (air conditioning, plentiful seating, interesting decor in each room, caesar salad with your meal) * Flame Tree yummy but outside - hot in August!
DHS- Pizza Planet - really good cupcakes with your QS plan for dessert; kids like to play video games while we relax in air conditioning.
Epcot- Les Halles Bakery in France (but my DD loves fish and chips from UK Yorkshire Fish and Chips- sometimes she will go here and bring her food to eat with us in the bakery).
All time favourite QS meal is Wolfgang Puck Express in Downtown Disney (Marketplace). The variety here is fantastic, especially for QS. Meatloaf, flatbread, pizzas, pastas, spaghetti/meatballs, salads, salmon, rotisserie chicken ... desserts like cream brule, frozen yogurt and cheesecake. We eat here 3-4 times per trip (we stay at POFQ so just a boat ride away). Also, real plates and cutlery here, as well as refillable drinks - kind of like a TS restaurant.