You can get pretty varied with the seasoning too. Parmesan is my favorite, but I like Italian herbs, nutritional yeast, garlic powder. You can throw a bunch of stuff on there together.
Sprayed with cooking spray, then dusted with flavored gelatin power & quickly popped in the oven, you will get something that resembles those flavored popcorns with a sucker-like candy shell.
Popcorn is a magnificent flavor-vehicle! My personal favorite is to melt salt, ginger, and sugar in butter and toss the popcorn in that tasty mixture. Or just douse the popped-kernels in sriracha.