American here, living in the Seattle area. I have never had pineapple on pizza. I like it on pizza, but only if combined with other toppings that are spicy and salty. I would try it on a burger, but I already have issue with burgers being too fucking tall (ridiculous and pretentious) and melting from too much grease, so adding more toppings that are liquid prone seems, logistically, the wrong direction. But as always, I am always happy to be proven wrong.