Mine started thinning in my early 20's. I have been buzzing it tight for about 10 years now. I'll be 40 in a few years so at this point in my life I really do not care. I shaved it for the first time about a month ago. It looked ok, but it was a pain in the rear. Just going to keep the regular clipper with no guard look for now. My wife's side of the family looks pretty good hairwise, so I hope my son doesn't have to deal with the old losing your hair in your 20's thing....sucks.
I'm going on 40 this year and starting to get some gray in the goatee and sideburns. The hairline has been high since I was 20 and I thought I would have been bald by 30 but it is just thinning at this point.
I'm like Hooker, I started going gray in my early 20's. It's genetic in my case but fortunately I still have full coverage with no signs of loss and i'll be 32 in May. I just keep it buzzed short and it's fine. My wife doesn't mind and I had gray hair when I met her. Note- I'm no where near Anderson Cooper gray.
I am 40 and shave my head every other day, for the last 10 years. I am lucky that i do not have an odd shaped melon. I will have been married 10 years this Nov. and my wife has never seen me with hair, nor does she want to. All that worrying as my hair evaded me for nothing.