That linked graphic seems to show Burgers is the main go-to in Chicago. That said, I'm a huge fan of Chicago deep dish. I know some don't call that a proper pizza (esp New Yawkers, and I'm in the area), but I do love that Gino's pizza.
If I had an office in Manhattan, I’d probably eat NY pizza for lunch at least once every two weeks. Chicago deep dish, on the other hand, is more like a special occasion food. Once a year, twice a year, maybe. But I’ll certainly go on record that the crust on a good Chicago deep dish is the best pizza crust you’ll ever encounter. I love that crunchy texture.
Otherwise in ten years we'll be reading an article on The Atlantic that leads with a CEO behind bars, jumps to a young kid learning about the world in his uncle's Pizzeria, then to a shady security team searching for the whistleblower by cross referencing HN posts against employee catering habits, and finally a retired FBI agent that steps in to provide protection.
So yeah, pizzasnob, please don't start talking about your love for dobermans.