On a serious note though, from a culinary perspective, the general pizza in the US is really not good. For the most part they really are just cheese and pepperoni delivery vehicles, and drenched in oil. I understand why people like them that way, in the same way people like HotPockets. But I've never heard anyone describe HotPockets as anything but a guilty pleasure, whereas pizza seems to be magically exempt from that.
Mind you, you *can* get a good pizza here. But not on a NYC streetside, you have to find a small place, preferably with an actual Italian behind the oven, who knows that olives, tomatoes, feta cheese etc are all very good pizza toppings.
It's kinda odd, it's a lot easier to find good Chinese food in Boston than good Italian food.