Bob Marley portrait

By now I hate our stupid lexmarkprinter @#$%!!! Stupid thing refuses to print, copy or scan anything for me, only after hitting it 5 times it decides to make a move...

Oh well I still have my camera, I made this portrait a few days ago and finished it yesterday completly. I haven't drawn a portrait in a while so I still have to practise things and might improve this later, yet I'm quite happy with how it turned out now. Its Bob Marley for those who couldn't see it. Well I'm always open to critiques and tips and tricks... I still want to improve his mouth and teeth one day. And its quite hard to draw dreadlocks...