First of all, it's not my fault it took you too long to realize you needed to get on finasteride. I'm not a fullhead by the way, I'm a NW1.5-NW2 (My profile picture is an artistic filter). If you're looking for a fullhead, look up Sean Hannity.
Secondly, not all of your "average joes" are the same. For the first guy, even if he had hair, that couldn't save his lack of facial definition: his jaw appears to be a slab of fat, and he doesn't have decent eye structure to make up for his weak lower third of the face. For the second guy, his jaw and brows are actually ok, but his forehead has the proportions of a baby: way to large and wide compared to his jaw. The most he could do with hair would be pulling off a Caesar. The third guy (grey goatee)'s jaw melted into his neck. His forehead width is more proportional to his face than the previous guy at least. The last guy actually looks pretty good bald, as he has fairly decent facial and head structure.
The key to pulling off the shaved head look, slick bald or not, is having an ideal skull structure, or the warrior skull:
Basically, a protruding browbone, a low forehead, a straight nose, a protruding chin, a wide jaw, and a straight back of the head.
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