I'm from the UK where it's not super common to put butter on popcorn. My favourite type of popcorn to get is mixed sweet + salty, which is what I usually get when I go to the cinema! I also used to eat toffee popcorn a lot too,, butterkist being the brand of choice! I don't like salty popcorn all that much unless it's mixed with sweet, but I generally don't eat salty snacks anyway.