I've always loved black & white linework. There is something just so beautiful and clear about it. I guess that's one reason I've always loved coloring books and independent comic books. When you strip away the color, you're forced to focus more on the design.
The drawing above is a Cuscus, one of the genetic projects created to take down the Wandering Koala. I drew it with a brush pen. I meant to color it, but it looks so nice with just the lines.