Absolutely, and I've never understood why so many people think this is odd.
Pizza is almost the only context in which I do like pineapple - I find it too stringy in a fruit salad, for example. It's okay in a sweet and sour dish, so long as there isn't too much of it.
But on pizza? Absolutely - and not just for "ham and pineapple". When ordering take-out I'll often start with a meat-based pizza, and swap out pepperoni for pineapple.