I'm also more comfortable in a tailored suit. Yet I dare not wear one to work, lest I be accused of pretentiousness or trying to take over the business. It's an interesting dynamic...
I wear collared shirts 365 days a year and as soon as it's warmer again I will trade my peacoat for a casual sports coat again. I went to work like this in startups and huge corporations even if it meant I was the only one not wearing a t-shirt at the office.
The good thing about being a hacker is that you can wear whatever you want. :)
