It's simple. I like making skins, people like new skins, you're all the people, so I make your new skins.
Also, if you post you want me to edit a skin, put it on my message wall telling me you how you want me to change it and I'll do my best to do so.
Requests are taken down below (or on my message wall if they are to be edited, not created).
I do shading on skins, and I try to be as detailed as can be, but please don't hate me, I'm not perfect.