Joe Celko does this but his outfit is a three piece suit. He told me that it is part of his 'personal brand' so he is easy to recognize and approach when at conferences and public in general. I wonder how different people's approach to him would be if his signature outfit was a hoodie.
That must suck on really hot days. Where does this guy live? Having read this whole thread, y'know what's even better than wearing the same thing every day? Not wearing the same thing every day. I have a bunch of different clothes, and deciding which of 'em to put on really doesn't take that much time out of my day.
I love my city but two things I can never defend: the heat and the traffic. Aside from that it is heaven on earth.