Pizza Hut gets a bad rap cause their stuff suffers the most in the warming bags. When it's crispy out of the oven it's better than Dominoes or Papa Johns imo. Of course, I used to work at Pizza Hut so I was able to get the best of the food obviously.
But I still buy them when I have coupons, it's overpriced elsewhere. And if you live more than 5 min from the store you might want to pick it up yourself, save the delivery charge and tip, and also get a better product.
Papa Johns has really good breadsticks and the best crust/toppings for the most part, but their sauce is so sweet it kinda kills it for me. I have to be in the mood for Papa Johns, where as Pizza Hut is a versatile pizza for any mood or party.
Pizza Hut has by far the best pepperoni of the three delivery places, so that biases my opinion too.