I get the feeling that most would prefer not to use one fly only which I do understand. Only a couple of you suggested the one fly they would use. Remember now this is for fun not necessarily for arguments sake. Having said that I do tend to settle down to a particular fly after a few casts unless it's a tough day. Thus the reason for the question. What is that one fly you tend to settle down to on most trips? That is where I was going with all this.