I prefer pizza with a a single topping, or two at most. Or none at all. But I see it a s a personal preference and not a rule others have to follow. I am pro choice when it comes to toppings.
But, when it comes to slices, I only get plain slices. This is because the plain pizzas are always the freshest, whereas the ones with toppings could have been made hours earlier (Is single slices only a New York thing)