At pizza places I usually get a kebab pizza (for example, kebab, onion, ananas, jalapeno + garlic), just because they are usually quite good and it saves time when you always know what to get.Plus, I prefer strong tastes to mild ones.
Though, I like self-made pizza better. It's more tasty and it's more like really food than just a snack that those thing pizzeria pizzas tend to be. And I usually put the following onto it:
-crushed tomatoe
-ham or minced meat coupled with beacon
-garlic and onion
-mild chili slices
-sliced tomatoe and ananas
Sometimes I also put blue cheese or pepperoni, or some other stuff i have in the fridge on it. Olives, perhaps mushrooms, whatever. I rarely resort to tuna fish.
