Alas, a couple of years ago, the big-wigs on mahogany row decided that our company needed to look more professional. Since then, I've been wearing dress slacks & shirt and a tie Monday through Thursday, with Fridays being casual day (collared shirt, slacks or jeans). Summertime we all allowed to wear business casual Monday through Friday.
As a computer geek who only very rarely meets with folks outside the company, I do not understand the need to wear a tie to work. Part of my gripe is that whenever I stop to buy something at a store after work, I am constantly asked where things are in the store - I suppose being tall and wearing a tie means that I must be someone in authority.
I suppose that's mroe information than you ever wanted to know about my day to day wardrobe.
-Z-man.