Here we are at the part of the season where we address everybody’s favorite question — what fly are you using?We’ve argued for years that the leader is the most consequential element in the system — much more important than the fly. That said, the fly must be reasonable.Most anglers are so focused on the flies because it’s the easiest thing to change. We’re quick to blame the pattern. And it’s a lot easier to clip off one fly and tie on another than to really break down your approach, your ca...