I wouldn't say it was an active choice, I didn't even known about hikikomori until very recently, but the description fits my lifestyle.
I went to trade school and graduated as a network technician/systems administrator, but I never got a job and then time just went on and suddenly I hadn't left my home for years.
I wrote in my first post, I'm sad I missed out on so many things in my youth, but sometimes I think the reason why I'm sad is because I have been conditioned by social conventions to believe that I should be.
If I had been going to parties in my twenties, according to social conventions, I wouldn't have missed out and should be happy, but what if I should be true to myself?
I have actually never really enjoyed other peoples company and had I been invited to parties, there is a great chance that I would just stand awkwardly in the corner waiting to go home.
I do get extreme enjoyment from programming and doing other computer stuff alone, and I'm able to do it 24/7. Maybe I actually have the most fulfilled life that I could ever have, following my personal preferences, but social conventions are preventing me to acknowledge it?
It's a double-edged sword.