Skull Guy Sketch

So here is a random sketch as I was taking out my frustration from not getting my motorcycle helmet, although I did get some pretty sick Puma motorcycle boots/shoes, and gloves. I have been looking through so many motorcycle helmets and it inspired something, I have more sketches but I'd like to add some colour to them to give them more flavour and umph.

I would like to practice some more drawing of females but I just seem too obsessed with motorcycle gear at the moment, I am sure it will pass once I get my motorcycle and start riding.