This isn't any claim to fame, gift, or special knowledge on my part either.
I shoot at box speed and use an incident meter to find exposure. I have lenses and shutters that work as they should. I develop film per the manufacturer's instructions. Anybody can do it. This is an industrial quality process and fully repeatable.
Using this process there is plenty of room to create variations in print character.
What I can't control here is the occasional pin hole in the emulsion or the subject blinking.