We can't get proper Chicago pizza in London so I have to go for thin crust, although if the crust is stuffed, that's OK too.
Sounds like a great business opportunity to me! Open up a real Chicago-Style pizza joint. Maybe also provide Italian Beef sandwiches...(also a great Chicago invented food)....and Vienna Beef Hot dogs (the best hot dogs in the world). But this is about pizza...
Here are some of my guidelines:
Chicago Style - Thin Crust: This pizza has a very thin and crunchy crust. Great for when you want a quick or light meal. Good for lunch.
NY Style: This pizza has a softer, floppy crust. The slices tend to be large in size. Good for when you're drunk at 3AM and need something to fill your stomach.
Chicago Style - Pan: This pizza has a crust that fills a deep dish pan right up the sides. It great for when you want to have a really good and filling meal. It's packed to the brim with cheese and ingredients. Great for when you want maximum flavor and a real, filling meal. Also for when you really want to take your time eating, enjoy the company around you and savor the food.
Stuffed: Similar to pan but typically has a shorter crust. The cheese and ingredients fill the center of the pizza. while the sauce is placed on top. Occasionally, a second layer of crust is put on the top of the pizza, covering all the cheese and ingredients. A good dinner pizza.
Neapolitan: This is a traditional Italian pizza which has a number of variations. It typically has a thicker, bread like crust with minimal ingredients or cheese. Good for lunch, great for a "fancy" dinner.
With the exception of NY Style pizza, most modern pizzas in the United States are derivative of the Chicago style pizzas (thin and pan). Traditional, Neapolitan derived pizza styles are also increasing in popularity.
Personally, I say nothing beats a pan pizza. The flavor intensity can't be matched. And no other pizza makes you as satisfyingly full. I prefer a thick, heaping slice of pizza over any wimpy soft crust pizza or an overly crunchy, often paper thin crust pizza..though they all have their merits.