I haven't seen anyone mention nutritional yeast yet, but that's become my go-to seasoning for almost everything; popcorn, pizza, scrambled eggs, bread, ramen, soft pretzels, and of course on fries. So damn good!
(Yes, I realize the name "nutritional yeast" sounds vaguely unpleasant and unappetizing, but I promise it's incredible if you like savory flavors, and it can also be used as a cheese powder substitute in vegan recipes.)
Yeah nothing ever came close to Parmesan for me. I'll use yeast when its the only option at my vegan friends places but I'll never be able to be truly vegetarian because of Parmesan
I put this only on popcorn but always on popcorn. Oh and sometimes in grits. So good in cheese grits, with cheddar, jalapenos and butter and salt. Way better than with just the cheese. So I guess only on corn.