It would depend entirely on what was on the pizza.
Sue me, I'm a spazz. Its thus my divine right to be a picky eater.
Myself, I always order one of three things. Black olive and extra, extra, extra, extra cheese, pepperoni and the same with cheese, or olive and pepperoni with a shitload of cheese. Now and then I'll experiment though, occasionally I have anchovies and pepperoni, or anchovy pepperoni and olive.
Anything with vegetables on it that can't be picked off without leaving any trace of taste or texture behind I couldn't eat.
I have a bitch from a while ago since pizza came up. Pizza hut in the UK. Tried to fob me off with ONE olive per slice. No. Not an olive. One PIECE of olive. And I'd asked for extra at that. Cheap fucking jewish turds.