Here are a few of the shaders that I have made along the way. My favorite group are the PBR Dielectric and Non-Dielectric with the addition of the metal shaders make life much faster when creating things. I like the skin PBR that I am working on. I have it set to change everything from the main shader. In Scene is the skin shader.
Here is the link for Andrew Price’s video’s on “How to Make Realistic PBR Materials”. There are many shaders he teaches you how to make during these two video. I do recommend both videos, I learned a lot.