Well, it's a monk taken from a Chinese Martial Fighter novel, simple as that. There are more than plenty of those running around.
To add on to this, I just found a guy in the HK comic Wind and Cloud that:
1) Is a monk.
2) Has a beard.
3) Has a chain of beads around his neck.
4) Uses moves (如来神掌, Buddha's Palm in English) that has even more SFX than the Monk in Diablo 3.
The only thing he is missing is the dots on the head, and he's also chubbier.
I hate it, aesthetically and logically.
Why would a character whose "body is their weapon" present the enemy with a nice big bushy handle on their face? It's also a fire hazard.
Please implement a "beard toggle".
I hope they make it so you can slightly customize all your characters, like you can make the barbarian slightly taller or shorter, you can change his hair style/color I hope they make the characters all slightly different in small ways, that way we don't all feel like a regular Monk or WD.