Cooler Ranch is my favorite, followed closely by Pizza and then Taco. Black Pepper Jack sounds good but I've never seen it.
I once had a cat who for some reason loved the smell of Pizza flavored Dorritos more than anything else. He was ~22 pounds, half persian and half maine my excellent compatriot. Food was his life, and the smell of Dorritos really made him happy - Pizza Dorritos more than the rest. I don't know if he ever got the chance to eat one, but he sure tried anytime a bag was in the house. He would even paw at the cupboard to get to an unopened bag of the stuff.