I figure a fatty is just as diverse as pizza itself. Whatever you like on your pizza, do it! (As for me, if the anchovies can walk their little tails to my house, crawl up onto the counter, slice themselves, and put themselves onto the pizza, they can, otherwise, no dice!)
What are some of those toppings the chain pizza joints put on their "crazy, wacky, insane, loco, mildly disturbed" crusts? Sesame seeds, poppy seeds, coarse salt, ground herbs and spices, parmesan and romano cheese.
I don't use a rub on fatties, but then, until this morning, I didn't use BACON! Perhaps I'll try it....