I want to say garlic but most restaurants I go to that offer to choose your own toppings don’t have this so I won’t count it.

If just one topping then bacon. Love the crunchiness and the taste. Makes any pizza taste amazing to me. Second close runner up is shrimp then sausage.

If I can choose a combination then grilled chicken + bbq sauce. I’ll fucking eat a whole pie of that yum yum.