Ok. Here's the finished Ziggy drawing. It's done entirely, from start to finish, in photoshop. There were no filters used in it and really the only tools I used were the basic brush tools. I did however used some burn and dodge here and there, really very little.

I think it's evident I didn't use any of the "specialty" brushes. They're a nice feature of the brush tool, but I think they have to be used sparingly and with a very specific purpose.

The only drawback to working this way is the lack of "texture". It works fine without it in my view. It is the most distinguishing part when compared to a pencil on paper drawing.