I wear glasses, so when I sport the bearded look, that’s where it gets cut; right at the bows of my specs. Started losing my hair on top of my head in my early 20s. I’d love to sport the Ben Franklin look, but my hair on top of my head is just incredibly thin, not actually all gone, and the one time I tried to shave just the dome down, it just didn’t look right.
Unfortunately, my skin disagrees with having a beard; once it gets to be too thick, the skin beneath just gets reddened and itchy; so I mostly just wear a hat and keep my face mostly clean-shaven (a lie; I actually usually look like I just woke up from a 7-day drunken celebration).