I like hood pizza joints the best. There were quite a few spots that had great pizza in Detroit. You just have to shoot your way in and shoot your way out.
When I can't eat hood pizza, I prefer Papa Johns or one of the overly-priced boutique pizza joints here in the ATL suburbs.
edit: I also would not feed my worst enemy that garbage called Pizza Hut. They should not even have the word "pizza" in their title, since that chit is not what I consider anything that remotely resembles pizza. I've tried the Hut in several different states and it sucked every time.