I can't draw in tablet yet. Many guys here in DA can do that. But I don't.
I like to feel the pencil on paper yet. Just I color and do lights/shadows in the tablet.
I'm amazed of your linearts, very fast and very clean. I can do this only in vectors and sometimes in physical and thin brush (and black ink) on paper.

Also, I didn't know the "Scketchbook Pro", man! I'll looking for it.