Domino's and Pizza Hut are both excellent. Papa Johns is effing terrible.
I have a local pizza place that I go to, but if I'm traveling, I go to a Cici's Pizza (you know, the one with the buffet), their pizzas are usually great, but it varies depending on the location.
However, I'm not really a pizza guy as much as I used to be. I usually just go pick up a burger at Five Guys (best. burger. ever). They don't do delivery, though (heh).