Obsession, it would seem, can do as much for one's reputation as talent.  When a friend approached me to say that her cousin was flying in from Oklahoma the next weekend, loved to fly fish, and needed someone to show him the local scene, I wasn't all that surprised, nervous yes, but not surprised.    Fly Fishing in OregonHere in Oregon, we have an amazing variety and selection of water. With several blue-ribbon rivers flowing through the state, the Deschutes, McKenzie, and Metolius just to name three, and some incredibly prolific still waters like Crane Prairie and Chickahominy Reservoirs, it's hard work to find a place that even I can't land a trout or two.  Now the first problem that arises with taking a stranger fishing, especially one who is reputed as a lover of the sport, is that you never know exactly what his commitment is in comparison to your own. I, for example, keep about half of the pockets of my vest filled with flies, tippet, leaders, and the assorted miscellany of fly fishing. …