Getting back into pizza, at least pineapple isn't as bad as these disgusting heretics that drown their pizza in salad dressing. I think we can prolly give these pineapple lovers a special dispensation as long as they aren't into the salad dressing garbage. If ya like both salad dressing and pineapple on your pizza, I'm sorry, but there is nothing I can do to help you. The castration wagon will be along shortly.
I only like ranch on cheese and pepperoni. Other ones don't really fit well with the flavor.. although pineapple and ranch might be a nice balance of sweet and savory.. hmmn. I won't lie, I am a man of odd tastes, and like to try anything to see how the flavors mix together (Often to the displeasure of others :p) . Anyways ranch is more liked on just the crust then the pizza itself.