Thoughts - Digital Drawing

Here is my new digital art.
It is a profile drawing of a man in serious thoughts.
You can see his posture - right hand resting on his jaw - as he thinks through his life.

He has an unusual and a figurative face that looks like a caricature character. Only Him could tell what's running through his mind.

This sketch was done with AutoDesk sketchbook application. You can see my processes below:

Thank you.