Sometimes, the best kind is when its freshly popped from the microwave, either sweet or salty, both are nice.
Paying the massively over-inflated prices for popcorn in the cinema is fucking criminal so I usually just buy a bag from the supermarket and sneak it in. And if I get found with it and told I need to pay for their bullshit prices, I pull out my diabetic medical card and show the if they want an issue with me bringing my own food, they can take it up with my doctor.