Plain / ready salted. Walkers. Without any crinkles or owt fancy. Keep it simple. I'm not a deep person.
Then probably McCoys crinkle cut. The dark green bag. Can't remember if they're Cheese & Onion, or Cheddar Cheese, or Sour Cream. Used to love them, but you do occasionally get a bad one that can put you off (either a black crisp, or perhaps a big clumped up lump of flavouring).