SkinwalkerMy main themes are cheap quick and easy to tie. I have a few drawers filled with expensive rooster feathers. But don't like using them much. Anymore.
If it's a dry fly add casts well, floats well, lands gently, dries off quickly too. If it's a wet fly add sinks quickly. Most of the time anyway.
But rules are made to be broken. That's half the fun.