Are there any good examples/tutorials of being creative with materials to emulate anime, manga, pencil/pen shading, etc?

I find that puting shader to result and giving a constant color grade with a sudden interpolation can mimick the anime feel. And a constant interpolation straight up does cel-shading.

Just found this and was wondering what else can be done.

Can freestyle be manipulated to look like hand-drawn line art? I have managed to make something sort of look like Okami with it.