I realize this is a broad question, but my life has changed drastically in the last few months, and I'm looking to experience more before I get too old. I know the usual answers like getting married, having kids, and so on.
I'm more interested in skills, hobbies, fields of education, practices, habits, and experiences that have shaped (for the better) the person you are today.
That's awesome that you were able to turn a childhood interest into a career! I'm not sure being a systems admin would be a fit for me, but I've always been interested in learning to code beyond a bit of html and JS.
Given your experience in the tech industry: If you had to pick just one programming language to learn as a starting point, which would it be?