In the real world I'd never go to a buffet type restaurant. At WDW, though, we have often done the buffet. Tusker house for lunch was probably our favorite, liked the great food, the freshest at any WDW restaurant we visited. The kids liked having their own buffet, lower counters and kid friendly food. I loved the tabbouleh and the hummus. I was sick of all the burger lunches and this was light and tasty. Crystal Palace was loved by my DH, a real meat and potatoes kind of guy. They have a few tasty salads, a steak and blue cheese one I recall favorably. The kids like the soft serve ice cream, go figure. After reading the horrible reviews for Chef Mickey's, we went for breakfast thinking they couldn't mess up eggs. We had to meet Minnie, so we went and were pleasantly surprised. We are not usually big breakfast eaters, but the kids and DH liked all the variety and I don't think you can ever have enough Mickey waffles. Biergarten we loved for lunch. Pretty authentic German food, but not so alien that the kids won't eat. There were kid selections, but mine were fine with the knockworst and potatoes.
My usual opinion on buffet foods is "lots and lots of mediocre food", but by and large I was pleasantly surprised at WDW buffets.