My facial hair grows in very quick and is very coarse... but my facial skin is really sensitive, so I can't shave but once a week. (I think I have a small bit of seborrheic dermatitis so that doesn't help, either.) By day 3 I have a pretty rugged look going and it's awesome... day 5 I'm looking unkept and dirty. D: I use a beard trimmer to get rid of the long hair, then clean up with a Mach 3.
Edit: I let my beard grow for two months once for a gentlemens competition... my wife hated it because I didn't know I was supposed to wash my beard regularly. She said it smelled like all sorts of shit.

When I finally shaved it off, I made one of those dastardly mustaches... and eventually a hitler 'stache. sup?