There are many great combinations that "spice up" our popcorn nights! Our favorite is nutritional yeast powder (which tastes really cheesy) tossed with a few sprinkles of soy sauce. We use a stove-top pan; the type with the crank in the handle that rotates an inner scraper. The best oil we've found is coconut oil and we often add a teaspoon or so or butter extract to the cooking oil.
Um... excuse me... I have to go make some now!