I really like the pizza at Wolfgang Puck's Express and the Cheesecake Factory express in DisneyQuest. As for in the parks, it's all the same. That said, though, Pinnocchio's tastes better for some reason

. And they have a really good salad that comes with the pizza there.
Oh, one extra tip, if you have kids and you're doing the
DDP, you may want to go to Pizza Planet in DHS, because many of the pizza places do no have pizza on the kid's menu. You need to look for a place that has no kid's menu so that you can order them pizza off the adult menu.