I never made my own pizza so I have yet to experiment on the actual toppings. And I usually get my pizza from traditional pizzerias so unusual toppings are not available.
I did however try a slice of pizza with potato and seasoned with rosemary and thyme. There was no tomato sauce and the slice was too dry and wasn't particularly flavorful so unless I get this type of pizza from a better shop, I don't plan on partaking with the toppings a second time.
I do remember trying a pizza from California Pizza Kitchen once and frowning at the tasting what I deemed exotic pizza topping of cilantro. Not a fan of cilantro....