Skulls, Skulls and More Skulls

I really enjoy drawing skulls..

These three illustration are a variation of just one skull I drew back in 2009. 

Originally a pencil sketch, I scanned it and forgot about it. About a year later I found it in some forgotten file, I was bored so I colored it on photoshop, added some texture and threw in a good old fashioned Mignola crown to finish it off.
About a year after that I entered a RedBull doodling contest and had about one hour to doodle something before the deadline. I sketched something up based on this skull and I actually won first place.