Here is something I've worked on lately, it's actually a dynamesh bust doodle which I then decided to take a bit further.
I haven't done a lot of rendering with ZBrush yet, so I gave it a try. I am by far no expert when it comes to rendering in Zbrush, but I was really impressed, how fast and easy it is, to get some nice results.
Modeled, textured and rendered with Zbrush. Final post work in photoshop.
Hope you like it.
BW version just for fun: