I am pretty lowbrow with no palette to speak of, so I am going mostly off of overall experience more than food quality. But my favorite place to eat is the Hoop Dee Doo, good down home food and fun. For making me feel like a special prince, I still love going to CRT.
For QS, I kind of feel they are all about the same. Nothing is terrible, but nothing has ever wowed me. As long as it is not too hot out, the best meal for me is a hot dog and ear of corn from Liberty Square Market and sitting by the river watching the boats go by.
Buffets kind of skeeve me out, but the Crystal Palace has always been pretty good, but I only have been for breakfast.