I love suits, and looking sharp. I have been told that I'm the best dressed man in my IT department, and I dress down for work. Then again, best dressed man in IT is almost certainly damning with faint praise.

Then again, I don't like the idea of having to wear a particular set of clothes for a job. I like suits, but I'd get sick of them if I wore them every day. So, to me the fact that a company has a relaxed enough culture to allow employees to wear what they like is a very positive signal, even though I will tend to dress formally on most occasions.