On the one hand I agree with you that you have to consider the texture of the naturals, or as warren puts it, make the fly "buggy". On the other hand, you want the fly to feel like the natural, so the fish doesn't spit the fly out when he strikes. True, you need the fly to look buggy in the first place to get the fish to bite (though we have some who will argue that some takes are an aggression strike), but I'm curious if anyone has considered the whole texture debate in the context of mouth-feel to the fish when it strikes, so it doesn't do an immediate refusal?
Just another angle to consider...
-ZugbugPete