Pencil Drawing, Watercolor, and then Watercolor and Digital
This was a brief experiment in working more opaquely than I usually do. (Both in the watercolor and in the digital.)
The digital work is very minimal. In CS5 it is just one Color Balance layer and a few normal layers.
Usually I will use hundreds, nay thousands, of multiply and screen layers to finish even a simple character when I am working over a much lighter watercolor.
As for the brushes themselves, they were mostly Photoshop standards and a few pencil brushes of my own. Nothing fancy since the traditional watercolor does most of the texture work.
I didn't do very well getting bright colors in the original watercolor. But if I ever need to paint something so that it looks like a complete mess, then I am pretty confident that I will knock it out of the park.