Overall, Wolfgang Puck Express. It has the best quality food and a wonderfully diverse menu. I prefer it to many of the table service restaurants on property. Unfortunately, I rarely visit Downtown Disney, but when I do, I make sure to grab a meal here. I especially love the tortilla soup and some of the pizzas.
In the parks, Tangierine Cafe in the Morocco pavilion. I love Middle Eastern cuisine and think Tangierine Cafe is significantly better than Restaurant Marrakesh. It's my favorite stop for lunch while touring World Showcase.