Re: JustaCLOT " ... dressing well improves the holistic ambiance of a brain....."
I'd much rather have a bunch of sloppy dressing highly creative people who are good at solving difficult problems than a bunch of uniform dressing people incapable of actually solving anything (the 'Soviet grocery store' look as someone upthread says).
Attitudes like yours are exactly why companies like HP are falling behind in the market place - customers are smart enough to know that 'good dresser != effective' and they don't want to pay for your suit. The most creative, successful tech people never, ever conform to how society or your narrow minded-ness thinks they should behave/dress/live. Accommodating those eccentric people is a competitive edge for a lot of businesses (like banks, startups & fast growing tech companies, even the government).
If you don't believe me, just go look up 'Head Bubba', who was the CTO of Credit Suisse for a long time.