55 Dragon bust sketches

Back in 2011 I did a "design marathon" on my own where I created 55 dragon bust sketches in Zbrush. I wanted to move out of my comfort zone and simply push my self in a direction I never took. There are timelapse videos of each of these dragons on my youtube channel. Each sculpt can be used as a rough reference for further study and dev.
Here's a link to one of them: https://www.youtube.com/watch?v=zI_elFsgojE
D.A gallery with bust sheets: http://damir-g-martin.deviantart.com/gallery/28486992/55-Dragon-designs

Cheers