I guess it just depends on who you are and where you are.
There is one guy at work in our department who looks good in stubble.
He just looks like a keener when he's clean shaven.
Stubble suits him. He's in his mid 20's.
I can go with a bit of a beard, but I have to keep it trimmed very close or I look awful.
Of course, most guys just go with what their wives or girlfriends like.