Salty!! I love seasonings.
I season my popcorn with all kinds of fun stuff... paprika/turmeric etc.. and I also love it with certain hot sauces/taco sauce
But, I have had cinnamon / sugar popcorn - it's yummy.
Paprika/turmeric? That's interesting. I'll have to give that a go next time. Maybe try pimenton.
You mentioning cinnamon reminded me of how my dad adds that when he makes his morning tea along with green cardamons.