I've always preferred to support the local town pizza-shops over the big chains myself. Get to know the local pizza-maker, they'll give you a decent deal for being a "regular", and they usually throw on more toppings than the bigger chains tend to. This all assumes, of course, that your local shop makes decent pizza, which around here they do. Not too many places make a decent Hawaiian pizza though.
However, as far as chains go, we have "Papa Gino's" around here, and they've always been pretty good too. I've not yet been able to try Papa John's, I think that they started in the midwest and only recently moved out east. I can't stand Domino's, I order it far too many times in college, and while their pizzas are notable for being edible "the day after" just lying in the box on the dorm-room floor, I have to say that the taste of them resembles cardboard more than anything else, and the toppings tend to be a bit sparse. About the only worse pizza is the strange, apparently chemically-formulated and alien-shaped frozen things that they call "frozen pizza" sold in grocery stores. The cheese isn't cheese, the crust isn't crust, and yet it costs quite a bit for whatever it is. I guess you are paying for the convenience of a chemically-engineered piece of edible microwavable substance that vaguely resembles pizza.