Let's see if I can remember them all:
Deep Dish
Stuffed
Thin Crust
Cracker Crust (almost like Mazoh)
Cake-style (think 1-2 inch thick dough.) There were at least two variants on this, Nancy's (on the west side) was pretty good, The Inferno (in Evanston) tasted like raw dough to me.
To that I would have added Pizza Bread, which was the specialty of the house at Gulliver's on Howard Street, just across the city line into Chicago, the stuff was so popular you'd place your order for 1 or usually more orders of pizza bread while waiting for a table. I"m told the place changed hands 10-15 years ago and the new owners changed the recipes, probably to save money, and the quality went downhill fast, so they lost the Northwestern student trade. But they probably lost a lot of that when Evanston stopped being a dry town, these days they even sell beer in the Student Union, what the WCTU (national HQ in Evanston) must think of THAT!!
There were some places making a flatbread pizza back then, too, including one that I think made it on naan, and one or two that made pizza on lavosh, which was similar but not quite the same as the cracker crust pizza, because the lavosh was pre-baked, sauce and cheese added, then essentially broiled to melt stuff, whereas the cracker-crust went into the oven with the dough still raw and all the toppings on it.
We lived near Main Street in Evanston for several years, there was a nearby place called The Pizza Oven that was just a hole-in-the-wall place with thin crust pizzas, but their sauce was the best pizza sauce I've ever had! I discovered them my freshman year at Northwestern, they didn't have sit-down space and were too far away for most of the students to go there, but they did delivery. A few years later, there was a Sunday just before finals that I was studying with my future wife at her sorority house and we ordered from Pizza Oven. When it came, her sorority sisters descended on us like locusts on a wheat field, so we pooled funds and ordered 2 more pizzas, then 2 more, I think we wound up ordering a total of 11 or 12 that day.
The original My Pie near the Loyola campus had a pizza that defied categorization. I think they moved, don't know if they still make the same pizzas.
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