I recommend jalapeno popcorn. If you enjoy a spicy snack its great. Only difference is when you're heating up the oil, add some pickled jalapenos and cook them until they're crunchy--the oil will absorb the spiciness.

Also, try using coconut oil instead of canola oil to cook the popcorn--its pricier, but its a great taste. I think it removes the need to add butter afterwards.