Bad dress sense

I get quite an earful for my dress sense. Now I dont have to feel bad about it, since I have an authority like Paul Graham backing it up! :)

the less energy people expend on performance, the more they expend on appearances to compensate.

Suits, for example. Suits do not help people to think better. I bet most executives at big companies do their best thinking when they wake up on Sunday morning and go downstairs in their bathrobe to make a cup of coffee. That's when you have ideas. Just imagine what a company would be like if people could think that well at work.