Hi, I'm Damir Martin and this is a quick look at how I created my DinoMonster's character "Stiks" in ZBrush.
Here's a low poly model that shows how the character looked at the beginning (Fig.01).
This is the same low poly object rendered in multiple angles (Fig.02).
Above the characters in Fig.03 you can see the set of brushes I used to shape the low poly object. To get the desired proportions and major shapes I used the Move brush. The Standard and Inflate brushes are the best when you need to add volume across the mesh and the Clay brush comes in handy when modeling muscles, especially later as you start to subdivide your mesh and add more distinctive lines to the character.
At this stage I was pretty much satisfied with the overall shape (Fig.04). Now I started with the subdivisions, and gradually added more and more detail to the model.
At this point, the model was more or less ready for next level: accessorizing (Fig.05)!