Can I just say, "Claptrap."
I work in finance, and am the only one there who wears soccer shirts to work... not loud ones, and not ones with sponsors on them but I do it none the less (right now I favour the Italia kappa jerseys). I wear dark sneakers as well. Brown or black ones - never found a pair of shoes that are comfortable for me, and I have tried Gucci and Prada, as well as Timberland and Kickers.
Even for the interview, I went there with Kickers on, trousers, and a collarless shirt (I *hate* ties - an old Victorian [and even older - Cravat] fashion that is well past it's sell-by date). They saw my resume and that I had gone to the best university in the country for the subject I studied and were surprised i even applied there.
Guess it's because it's close to home and I have to look for a job I *really* would want to do.