You know, I learned this when I spent months campaigning in Illinois and eating "Chicago-style" pizza: if you accept what you're eating isn't real pizza, but is an entirely different dish that goes by the same name, it can actually be quite good. Papa John's, if you try some of their novelty stuff, buffalo chicken whatever, cheeseburger whatever, all the ****ing meats whatever, they're not bad! Again, you have to get past the fact that it's not really pizza, and then some of it becomes enjoyable.
There's also the fact that what you'd get back in Italy can be substantially different than the kind of pie you'd be accustomed to getting from the joint on the corner. It's more like what you'd get from some "artisanal" joint up in New Haven. So I grew up with Mario's and Ralph's in Bayville, on the Island, but that's not even "real" if you go back in pizza history.
Spending 20 years out of NY kinda opened my eyes. Some of the Chicago stuff, New Haven, Buffalo, Neopolitan style, it's all really good when done right. It's not "real" to me, to varying degrees, but it's good. I've even found some joints in DC/MD/VA ("The DMV") that I really enjoy and even my still-snob Brooklyn-born father approves of. None of it is Papa John's or Domino's, but it's the same kinda principle.
However, do not eat "Detroit-style" pizza, or "Cleveland-style." And NEVER even CONSIDER eating St. Louis style, which is worse than a pie from pizza hut that fell on the floor at a barber shop.