I don't eat meat often, not enough to call myself vegetarian, but I always avoid it on pizza. So, I usually have just extra cheese and occasionally mushrooms. I haven't tried much else, honestly.
ummmm... sweet potato, honey mustard, and onion chopped up into little pieces with cheese in the crust. might sound nasty, but it tastes really really good. its in each and every pizza place in korea.
Anyways. I have the boring old pepperoni on my pizza. Sometimes meat lovers or bacon. I should really try pineapple though. I love the sourness of pineapple.