are pepperoni, sausage, mushroom and bacon. as for the least popular, those would be anchovies, eggplant, pineapple, and artichokes.
when it comes to crusts, 'regular' is the most popular type, thin crust is second, and deep dish is third.
surprised by this? well, celebrate this weekend with your favorite type of pizza, and don't even feel bad eating the whole pie alone. you earned it, i'm sure. 