At Epcot, Morroco's QS (Tangierine Cafe) is our favorite but the France and Japan ones are up there. At AK, we like Flame Tree BBQ and I think the Yak & Yeti QS was good too. Haven't tried the Pandora one but would love to.
MK favorite used to be BOG but that was when the lunch was different, now I don't think we have a favorite. No favorite QS at HS for the moment either.