Formerly located at Sheffield just south of Belmont, Pat's Pizza is a northside staple. They have fast delivery, a heavy hand with the pizza toppings, and an extensive list of Italian entrees. While the thin crust is not my favorite (tasts like a flattened pretzel), others I know think very highly of it.
The cheese they use is very good; it holds all the toppings in place but is still gooey/stringy enough to make me happy. I would like to see more sauce on their pizzas, though.
They often have specials, such as ordering a large (or maybe it's a certain $ amount?) will get you a free 6-pack of soda.