Many of the candidates listed here aren't crisps at all.
I don't have a favourite flavour (flavor for any Americans) or make. Although the 'traditional' ready salted, cheese & onion, and salt & vinegar are usually selected, with worcester sauce and marmite being occassionally selected. I used to like those hedgehog flavour ones that used to be sold, not seen them for a while. These days though, diet considerations mean I only tend to indulge in the 'baked' variety.