This is actually a good question and interested me: generally I wear a trashed pair of jeans (often the same ones, 1995 Versace - absolutely classic), a t-shirt and either a pair of cheap loafers or a pair of not-so-cheap running shoes. OTOH I love to dress up: evening wear such as a dinner jacket and bow tie is just the business. (My grilfriend kinda likes it too ;-)
in reply to Dress Code
In many ways I use clothing as a kind of mental warmup - for job interviews and work the actual act of putting on a very good suit is a very good focus exercise - you can use the suit as a kind of mask much as actors say that they 'become' the character when acting.
On a final point - words have no power unless you give it to them.