I have a little Moleskine (3.5 x 5.5) notebook that I only draw skulls in. I started in November of 2013 and I do one whenever the urge strikes me. It's not like a skull-a-day thing but sometimes I do get into a period where I will draw one every day for a while then I won't draw any for months. I even lost it for a while and was very sad. I think the longest gap between pages has been a year. This is the most recent skull, drawn on 05.28.2018. Most of them are posted on my Instagram but you have to scroll back a ways to get at the bulk of them.
Interesting to try to capture the detail in this image using different media for different items. It took a while, but I was pleased with the result. From a magazine photo.
Illustration painted with watercolors and outlined with pink pen. The borders were achieved with washi tape (low tack and unlikely to tear up your paper.)
This is old (2007). I used to work at the ad agency that had the Harley-Davidson account for a number of years. I always carry around a Moleskine sketchbook and take meeting notes on one side while doodling on the page next to it. This doodle ended up being used extensively in the Harley-Davidson "Dark Custom" campaign as well as on a line of Dark Custom Motorclothes.
It say's "FUCK YEAH" in it and they never noticed. :)