I make versatile, multi-purpose shaders with parameters so they can easily be controlled without having to see the implementation nodes, which are on the right. For example, the nodes used to make a metal vs. rubber vs. leather vs. paint are exactly the same and there are just six, connected exactly the same way. (Not counting the bump map) To achieve each material is quite a few value and color changes and few people besides myself know those. I reduce those differences to a few parameters: color, shine, and blur. The other nodes take care of capturing the knowledge that I have on how to adjust the shader to all those variations. When I make shaders that are versatile, then they have a lot of nodes. When I make shaders that can only do one thing, then I have six nodes. If somebody asks me to help them make one material, I show them six nodes with all the values filled in. But I don't charge for shaders like that, I give them away in tutorials. I charge for the versatile, multi-purpose shaders you can't get from anybody else. 

I, for one, do not understand all of those parameters and what they would need to be for make this material or that material. So I really appreciate your shaders BB! And frankly I am always astonished at how much work you do and then give away for free. You are truly a gold mine to the Poser community!! :D