well i started painting digitally years ago. i love real paint. but i needed to do this quickly, without the drying time of oils so i chose digital. my years of real painting helped with this a lot, as i don't like having a look that is too digital.
i am quite happy with the outcome, but i still prefer real paints.
Overall the proportions look good, and he's certainly a creepy sort of character, blanked eyed stare and sneering lip indicating some sort of malice towards the watcher. About the only thing that looks perhaps a little off is the ridge of the nose to the left, the nose itself looks a bit off-center, though if that was the intent, it certainly adds to his creepiness.