You're not the only one. At my last company, a very casual place, we were doing Fancy Fridays and I enjoyed it immensely. In a way, it was just an adult version of playing "dress up" and was done kind of tongue-in-cheek.

The truth is, especially for guys who have a body shape that reflects their sedentary job, nothing makes you look better than a well-fitting suit and a properly knotted tie.