this is one of my sketchbook Illustrations. I love to sit down after a hard days work of pushing polygons and do sketches with no particular purpose.
Most of the time I don´t have a particular concept in mind, but rather start sketching interesting forms and see how it evolves. I try to find a dynamic pose and define a characert out of it, then I add an environment and if I am happy with the results i put it into Photoshop for coloring. Most of the time the coloring is done weeks after the initial sketch has happened.