Which camp do you fall in?
There are delicate flies as an example tyed with CDC which catch fish but are rendered largely unfishable thereafter due to fish slime and a battering and need to be changed.
There are durable flies which can be driven on over gravel drives and still catch fish and can be used again immediately afterwards.
Do you tie your flies just to catch one fish and tye on again or do you tye flies, that when popular with the fish, stay on the leader to catch another?
Or don't catch fish anyway.