It's funny that you say your kitty loves cheddar popcorn, because mine is absolutely obsessed with cheddar flavored rice cakes. The thing is, she doesn't even eat the rice cake part... she just licks all of the cheese dust off of the chip, and then abandons it. I like giving it to her though, because it's a good treat -- it's really just powder, much more taste than substance, so I feel like it's not as bad for her as other human foods I could be giving her.
My cat basically loves anything salty, but she won't eat sweet food -- she doesn't even try. She likes bread, soup broth, butter, and as I recently discovered, tuna (though I should have known that)... I was making tuna salad the other day and I gave her a bit of the tuna straight out of the can, and she liked it so much that she literally started suckling my finger because the taste was still there.
