I suppose in this sort of post the facade of being non stereotypical is gone so here goes, I reckon ts all to do with what people do to their bodies and how they feel in themselves, the people of 'the Jeremy Kyle show' or as my partner calls it 'The Degenerate Show' are usually drug addicts or alchoholics or a mixture of the two so thats probably why they look so bloody rough, as for geniuses they probably spend a lot of time poring over books so that probably screws their eyes up, trainspotters in choosing their choice of hobby illustrate that they're not interested in being cool, so they probably wear anoraks to be practical, its probably bloody cold!!! From a more academic point of view, people like to conform, so for example accountants dress like all the other accountants to fit in.