I started this blue pen drawing of Shayna Colvin back in 2013, and finally finished it a few days ago! It really only took about 4-5 sittings, but I never got around to doing it. I was looking through an old sketchbook and came across it and thought, "I'm going to finish this tonight." I drew for four hours straight and now here we are.
Here's a video showing a bit of the process that goes into my blue pen drawings, and some progress shots below.