I'm mostly Irish and Cherokee. The Irish trumps the Cherokee on facial hair. When the beard's gone I still keep the moustache. Moustache has been there since I was 17 except for 6 weeks in summer of 72 at Lackland AFB for basic.
My Irish blood definatly affected me here.
I could grow the "wingchops" and partial stache at 12, and a full beard at 16. The stache was complete at 17 or 18.
Because it grows so fast, I keep hoping for the Miami Vice beards to come back, since that's my natural look.