Hello there, Here is my take on a stylised comic book style shader. You can use it in a variety of ways from a standard cell shading to a stylised haftone comic book style. It also has some specular abberation adds a bit of punch and distinction to the specular highlights. Also you can use it as smooth as you like or ramped if you're into that sort of thing.
Just import the shader and the HalftoneDot.jpg to your project and dont forget to plug it in the Shade Filter Texture.