Holy crap! Twenty years and a few thousand of your posts later, today I learn you are not a woman. 
Sorry 'bout that.
Like so many said, bald head depends on shape. I think most guys look okay. I’m okay with most beards, as long as it’s trimmed away from the mouth so that I don’t have to watch you chewing hair when you eat. However, you could probably convince me that guys that purposely shave a five o’clock shadow all the time should be heavily fined, maybe even imprisoned.
If I ever do the shaved head thing I would absolutely wear hats outdoors. Just the thought of my virginal head skin being exposed to harsh sun brings visions of skin cancer to my mind.
I think some of them do. I know a couple that insist they didn’t, but it was obvious for years that they were quickly losing their hair. I have no guess at how common it is tho. It wouldn’t surprise me to find out it was pretty high. there was even a Seinfeld sub-plot about Elaine’s shaved head boyfriend freaking out when she pointed out that his stubble showed he was actually going bald.