This is an age old question. I am a non-washer. I like the feel of crisp fabrics. Shrinking is not a problem unless you buy really cheesy fabric. During the latest boomerange swap I washed my fabrics becasue we were asked to. There were a few that came unwashed, and I liked sewing on them better. I feel it makes a crisper seam. Whenever I've used spray on stuff later, it just doesn't feel as good. And wrinkles - ugh, they are persistant little buggers