I no longer eat potato crisps for the taste.
Instead, crisp intake is purely centred around the generation of feelings of nostalgia.
As such, I only ever buy Smiths Chipsticks and Walkers French Fries.
Cue wistful childhood memories of their purchasement at the swimming pool vending machine, or their wintertime consumption on the smokey top deck of a double-decker bus as it forges its way through the slush and snow...
If we are discussing crisp nostalgia, we must not forget Discos and probably more importantly Smiths Square Crisps. I think both are still available, and we are obviously (it goes without saying) talking salt and vinegar flavour. In both cases, they taste only of vegetable oil, salt and vinegar. There is no troublesome potato flavour to mask the taste of the additives.
I am intrigued by your reference to swimming pools too - the best crisps I have ever tasted were purchased from the pool vending machine. back in the days when I did either activity, having a fag after a swim was a pretty great experience too.