This is the image that currently appears on my business cards. It is based on a sketch I did in 2001, easily one of the most elegant and sensual sketches I drew of focco. I gave it a simple treatment with vectors, using the minimal number of fluid broken lines, intending to use it as a logo or for a business card. (You can view that old version here.) It remained unused, though; perhaps I wasn't fully satisfied with it, or was saving it for a better use.
In 2005, I came to a point where I needed to order more business cards, and as I was no longer associated with the company that appeared on the previous batch, I decided to redesign them in a more personal way. So I blew the dust off the sketch and reworked it. The broken line approach was abandoned, and I used crisp contour with tiny disconnected flecks suggesting the indicating continuations of crossing lines. I also made the drawing more solid and correct overall, and used the colors of this site to frame the line art.

2001
Vector art

Look at preliminary sketch to this picture here