OK, the best pizza is one I've made myself. That aside, we usually order Pizza Hut because we re not in the delivery area of the local Papa John's.
Sometimes, it's not about "good" pizza, it's all about "bad" pizza - a little greasy and thin. There used to be a chain in IL called Hungry Howie's. You could get a giant pizza for something $5 and it was bad. But it went really well with a beer and a tight budget (they were found primarily near colleges). They're all OOB now (went under before we moved to CA - where, Mr. Puck aside, there is no good pizza to be had)...sometimes I really crave a Hungry Howie's pizza.
So if we want good pizza, we make it or go for one at a local restaurant. Sometimes, though, we want junk food and Pizza Hut is certainly that if nothing else.