The facial hair could depend on the guys facial/head structure... But if it's a full beard that is kept neat and clean... I find that more attractive. The problem with facial hair is, when having a beard becomes a "fad", everybody else would want to try it. Downside to that, not all men are capable to have a nice, full beard due to their biological makeup. So the beard may not look full/good on many men. So yeah, like I said.. it depends. I personally like either the beard/5 o'clock shadow. The scruff may vary since some guy's can have "the full scruff" while others look like women that try to grow facial hair.
Some girls love facial hair and it may look nice but the issues we have with them is they're not very soft for us... like beard hair is quite sharp so scruff hurts our faces. A bear full on beard is kinda tough cause a lot of bacteria and stuff can get in there plus we can feel that too if we kiss you so its kinda a no for that too. That said, whatever you feel comfortable with his best. I personally don't like facial hair even though it may look hot on a guy. simply cause its too rough for e.