I think we all have at least one of them. It's that pattern that seems to more-often-than-not save an otherwise fishless day. And regardless of whether it's time on the water, or sheer happenstance that brings it success, each time a fish raises to it the position within your psyche is more deeply ingrained. That fly for me is the Penns Grannom. The pattern is one of my own that over the years has grown to be a favorite when confidence is low.
What is your "Comfort Fly"?
You don't have to be a fly tyer to have one.