Hmmm this is bizarre....
In terms of actual little packets of crisps that you can eat as a small snack it has to be McCoys. However, I adore Pringles and Kettles - probably more than McCoy's. Kettles would be my absolute fave, but then there're crisps and there're crisps....or more to the point there are crisps and there are 'hand-cooked potato chips flavoured with the finest ingredients' yaddayaddayadda....