I don't need to "power dress" but I have too look conservative, "normal", and stay warm (cold library setting). I shop at the thrift stores in expensive parts of town--last year I got an orange crate of expensive cashmere, silk, and rayon turtlenecks, a dark wool flannel skirt, and a couple of suits (just in case) for $1 apiece. Clothes I would never buy new.

Outside of work, I wear a lot of calico. I've started making more and more of my own clothing since commercial clothes don't fit me well, are usually made by children in Sri Lanka, and are boring. Also--the weekend is my time. If I want to wear the yellow calico 1940's housedress I made from an old pattern, it's nobody's business but mine.