I used to be in the anti-pineapple camp based solely on principle.  But, the contrast in flavor of salty and sweet is too tasty to deny.  I have caved and switched sides.  Might I suggest also adding some spice to the equation?!  Try a bacon, pineapple, banana pepper and jalapeño pizza sometime! 

 I love pineapple and even pineapple with pepperoni is good. But with marinara sauce and mozzarella cheese? That just sounds odd.