Pizza, when done right, is great. When it's mass produced or made poorly, it sucks.
Old Forge, PA has several excellent pizza restaurants.
New Haven of course
NYC
NJ
These spots are among the best. I only had Chicago pizza a few times. There was a place south of Midway Airport that had a pizza with Italian beef toppings. It was amazing. Thin crispy crust cut into smaller pieces than slices. My 1 experience with deep dish was good though not great. Giordano?