True dat, you guys talking about knots and integrity etc. I have lost a few because my knot wasn't worth shit. It happens from time to time, fishing late etc. But I've probably lost more fish on snags and impatience
Also, when I go to a new area I shop for flies there. That way I don't have to research what the hell the fish in that area feed on. I enjoy talking with local fly fishermen too, so it's always a great experience shopping for flies. Also, there are some really great craftsmen in some areas that make incredible flies, sometimes I meet them in the shops by chance and it's great just listening to them talk about the materials they use to make their flies and all that kind of stuff.
I missed fly fishing this season, I like stream fishing in high country. I will get out there next spring.