I'm just curious here...if you had to choose one fly to fish for an entire calendar year, what fly would you choose? I live and angle in Colorado's Gunnison Valley and I would choose a Pat's Rubberlegs Stonefly Nymph. Specifically a size 8 chocolate & black version. This nymph catches fish from mid-February all the way through mid-November and easily catches most of my fish each fishing season. If I'm nymphing, at least one of my flies is always a Pat's Rubberlegs. I'm interested what fly you would fish if you had to choose only one for an entire year?