Ah, but there isn't just one "American" pizza.
New York style - properly made, this is the stuff that dreams are made of. Thin crust with just enough pliability to fold a slice so you can eat it while you walk, no overdone toppings, just simple one or two topping pies.
Chicago deep dish - basically a cheese cake. Not a cheesecake. A drippy, cheese, "cake". More of a spiritual cousin to lasagna than to pizza. Tastes OK, but it's not pizza. It's basically a casserole.
Chicago thin crust - thinner and crunchier than New York style, so you can't fold it, fantastic pub food though. Heavy on the meat toppings. A suitable redemption for the sin that is deep dish.
Detroit style - In between New York and Chicago - not as weighed down as deep dish, and with a bit of crunch. Surprisingly good. Not as good as New York.
California style - is basically Japanese pizza's American cousin. Californians will put damn near anything on a pizza.
St. Louis style - overly doughy imitation of NY style that uses processed cheese. It's an abomination. AN affront to the gods. Like seriously, someone needs smiting.