Actually my favorite pizza is a Bacon Cheeseburger Pizza or a Chicken Fajita Pizza....
On the Bacon Cheeseburger
Instead of tomato sauce use mustard, bacon, hamburger, onion, cheddar and mozzarella cheese topped with pickles.
On the Chicken Fajita
Instead of tomato sauce use salsa, grilled chicken, black olives, onions, cheddar and mozzarella cheese.
On a regular pizza,
lots of mushrooms and onions and hamburger and Canadian bacon.