Hey, thanks for stopping by!
I do agree with the blandness of the air popper. It needs oil to have any chance of flavour.
My personal favourite topping is the White Cheddar sprinkle that I keep tucked away in the cupboard. There's a tasty Kettle Corn, too, but I usually keep going back to cheddar. I'll need to try some freshly grated parmesan! That does sound tasty.