I dislike pepperoni on my pizza. I can stand it, but I'm not keen.
I like spicy beef though (spice to an extent), and ham and chicken.
I'm not really keen on sausages on pizza, mainly because they're usually frankfurters, which I think are just vile terrible excuses for a sausage.
I also like sweetcorn on my pizza. That can always make a pizza that much nicer.
I like mushroom too, but not too much and not too large of a cut (I like the taste of mushroom, but not really the texture).
I also like pineapple, but that can go kind of funny on a pizza. Sometimes it's too wet and the flavour is everywhere, other times it's cooked too much and just tastes horrible.
I don't really like onion or peppers on my pizza either.
Best pizza I have ever had was a freshly home-made pizza from a little restaurant in Rome.
The cheese was just sooo juicy and sweet. I don't really like the mature taste of cheese, so this mild cheese really hit the spot.