I voted pepperoni, mushroom and onion (raw), though the last could just as easily been green. And left to my own devices, I often double up on the pepperoni.
But I will also say that I am no stranger to unusual ingredients, and the above preferences are rarely what I wind up eating, because I’m usually sharing with others. Other common toppings in our household include shrimp, spinach, artichokes, ground meat, Canadian bacon, regular bacon, whole garlic cloves*, chicken, basil, artichoke hearts and eggplant**. Sometimes we get garlic sauce or EVOO instead of tomato sauce.
And then there’s the fact that the closest pizza place to our house is owned by an Indian dude, so we can get things like paneer or tandoori chicken…
* baked/roasted whole cloves taste completely different from minced or sliced. They develop a sweetness whioe still retaining the flavors you expect from garlic.
** most places that have this use cubes or thick slices, but it’s really best when it’s thinly sliced- it becomes crunchy, and its flavor intensifies