I thought I'd save this for another post since it constitutes my own unabashed preferences when it comes to flytying. Please understand that I am a very opinionated person, and the following are only my personal preferences. However passionate I am about them, they are not at all meant to imply what others ought to prefer.
I don't particularly enjoy realistic tying. Honestly, I'm just not that into bugs (I know, strange site for me to frequent). When tying fishing flies, I like tying flies that are simple and fish well. When tying for show, I know that any bug I tie will never measure up to the Good Lord's version, so I don't really see what my crude facsimile would add. So that sort of tying just doesn't interest me. I do respect tiers of realistics, though, for the ingenuity they display and attention to detail. We often admire most what we cannot do ourselves, and I could never be a good realistic tier. I am often left wondering how these tiers do what they do.
Within the genre I choose to express myself, artistic salmon flies, I don't really like looking at the flies others tie because I feel that it stunts my creativity and I don't like stealing (either intentionally or subliminally) others' techniques. I'm a bit of a flytying recluse, and I like it that way.
When it comes to appreciating others' work, I value ingenuity above all else. If I'm left wondering, "How did he DO that?" or "How did he think of using THAT material in THAT way?" then the tier will have gained my respect and admiration. If not, then they won't. I am not very impressed by technical tying per se unless it is precise in its execution of something new and interesting. I hate looking at a millionth perfectly tied Green Highlander (OK, maybe there aren't that many, but if there's one perfectly tied Highlander, then that's enough as far as I'm concerned). I would much rather see an original pattern, with all its flaws, tied by the inventor of that pattern. That's not to say I never tie a classic pattern, but I don't enjoy it nearly as much as I do developing and tying my own patterns. And I would be glad if no one else ever tries to tie a perfectly executed version of one of my patterns. If someone does, they will have missed the point of my tying. It's meant to express ME - go find some other way to express YOU.
I will say that I have developed a technique if I have developed a technique, even if someone else happened to have developed it first. Because I don't like seeing what everyone else is doing, many of the things I do are likely not original in the sense that I'm the first person to do them. But they are original in that I didn't learn them from someone else, and I value that. It may just be another wheel I invented, but if I'd never seen a wheel before, then it's no less impressive a feat than if I'd invented the first one. If someone else later makes a similar wheel without knowing about previous wheels, then I hope that their creativity will be valued for what it is. To me, originality is about creating something new to you, not new to the world. If it also happens to be new to the world (which is a rare thing indeed), then that may be special to the world, but it ought not to make any difference to you one way or the other.
What makes the classic salmon flies great is that they were innovative and artistic in their time. Replicating them two hundred years later is not innovative or artistic, any more than making reprints of T206 Honus Wagner baseball cards is innovative or artistic - modern representations of classics ought to be treated the same way as Honus Wagner reprints, which is to say they should have little to no value beyond the materials used. And I would argue that those materials could have been put to better use.
If you must make a classic pattern, make it with period materials or the closest thing you can to period materials. Don't cheat by using modern materials. Virtually every tier of classic salmon flies today uses nylon thread without giving the choice a single thought. Then they take great pride in how glassy smooth their floss bodies are - better than the originals. Really?! Use silk thread and I'll be impressed even if the body isn't glassy smooth.
I do not like salmon flies (many of the classics included) with bizarre and complicated color schemes. Many salmon flies (many of the classics included) look clownish to me. Why does a salmon fly have to have 62 colors, most of which are clashing with one another? The Victorian Era of salmon flies has all the same irritating tendencies of the Victorian Era in general. Just as I would not wear the clothes from that era, I also would not tie the flies from that era. Unless someone pays me handsomely to do it, in which case I would gladly do either of those things.
I do not like it when people make patterns with rare feathers or fur just for the sake of using rare feathers or fur. I really like it when people make beautiful flies using common feathers. Finding beauty where others just see something common is a fantastic feat in my eyes.
I do not like substitutes. If I cannot legally tie a classic pattern with original materials, then I won't tie it. If I'm tying my own patterns, then there is no prescribed pattern and the word "substitute" is irrelevant. One more reason to invent my own patterns rather than tie those of others.
I think that flies should have hooks. Always.
I think that flies should be able to get wet, hook a fish, and land a fish without falling apart.
I hate synthetics. I particularly hate foam. I tolerate synthetics in my fishing flies if they add something that I cannot achieve with natural materials, but I do not, under any circumstances, enjoy using them, ever. The synthetics I hate most are those made specifically for flytying. I hate the plastic winging material that has perfect little veins stamped on at the factory, or anything of that sort. Let me dig a variety of plastic bags out of the garbage and I'll make my own winging material, thank you. My one consistent concession to synthetics is nylon thread, which I use in my fishing flies. I'm not sure why, maybe because I have lots of it and don't want to throw it away (I'm very, very cheap), or maybe because I'm just used to it, or maybe because I'm just throwing flies at fish who couldn't care less - I don't know. But I'll never use nylon thread on my artistic flies. (Actually, I confess that I did use nylon thread to tie the Golden Arrow I made for my dad. I hated using it, but I had a very tight deadline and didn't have time to order silk thread in the right color. I still hate that material choice, and even though I love how the arrow turned out, every time I see it I have the urge to rip it apart and tie it again with silk. If it weren't for the fact that my dad already has it proudly displayed in his house and couldn't care less about its having synthetic material in it (he's a bait-fisherman, for crying out loud), I'd do it. Maybe someday I'll work up the courage to ask him if I can rip it apart.) That said, I think synthetics can be used creatively, though their creative use in my experience is the exception rather than the rule.
While not a definition of flytying per se, I hope that the above brief and gently worded preferences will help others understand my approach to tying.
-Shawn