And yet there are many times when it does not make any difference what pattern one uses. One thing is certain. The more bedraggled the fly gets the better the trout like it. I think there is a reason for this. I think the bedraggled half worn out wet fly more closely imitates a nymph than a new one does. Most commercial flies are tied too bushy and full. A little trimming of wings and thinning out of hackles will often work wonders.