From a European perspective, American classic pump shotguns have the same mystique and "exotic" air as European doubles have in the US (judging by what is written in this and other venues).

As for the art side of things, there is an obvious, to me anyway, Art Deco element in a classic pump that rivals the Art Nouveau influence of a classic double. Just look at the pics for confirmation.

I do not own a pump, by the way. If a Stevens 620 in 20 gauge comes my way though I would not hesitate.