Most of them taste the same to me. Hate Salt & vinegar though, they are just too salty and too vinegary. Prefer Kettle Chip crisps, at least they aren't so salty. Actually JJ, I don't like cheese & onion either ...
Walker's sensations did a mushroom and wine flavour at one time and I couldn't stop eating them, and Marks and Spencer made a baked potato with butter flavour, that really used to taste like the crispy skin on a proper oven cooked baked spud (as opposed to a microwaved one - eugh!)