Pitchfork, you bring up a good point.
If I go to a decent restaurant, with a chef of any renown, I wouldn't tell him what or much seasoning to use. The most I would do is tell him what kind of dishes I like or perhaps mention any strong dislikes, e.g. anchovies. The chef is the artist and I want to taste his creations, not mine.
Even mentioning my dislike may undermine the experience. I hate anchovies but I've had some dishes that included anchovies that I loved.
I took a dislike to Latakia, after being blown over by a couple of Lat bombs. But now, two of my top favorite tobaccos are SG Navy Flake and GLP Quiet Nights, both of which use Lat in delicious proportion to other tobaccos in the blend.
Besides, who wants a copy, even of a classic, when they can have the original? I would specify basic size and materials, perhaps shape, and let the craftsman surprise me with a true one-of-a-kind.
Just thinking. . .
pax