When I first started my profile here at Behance, and before I uploaded my profile picture, default picture was in place and it looked like the one below this text. It seamed like it's a step away from becoming a Batman so I took that step and incorporated my self-portrait.
It's made entirely from vectors. 

I have a full beard but this one looked much nicer. I kinda like it, maybe I'll shave the beard off and leave the moustache. 

Just the outline view. 

And a close-up. Much of the time went on moustache, actually.