Digital portrait painting

Painting this portrait was so much fun and frightening at the same time. The head is in a weird angle which i always seem to struggle with but i thought, the worst can happen is its gonna look really bad. But it didn't. Because i spent enough time on the sketch before moving on to color. Most of the time i don't do that.
This one was also hard because of the facial hair, its not too big or completely shaved, Even though i didn't draw it exactly how it is in the reference image, i managed to make it look proper.

Let me know your thoughts on this drawing study.

Here are some process shots:

Reference image that i used for this drawing.