Pouring tons of effort into personal projects doing things that you CBA to do for anything else? not being able to prepare minimum repros because reporting the bug itself was the most that you could manage? eh. My case of ADHD in a nutshell.
I didn't have medication for the majority of my life and I got plenty done. I just had a certain degree of executive dysfunction that's hard to describe, but manifested itself as basically losing every hobby whenever I got bored (which is not supposed to happen nearly as much).
I didn't even know it was a thing that just happened to people (and had a name like ADHD) until about a year ago. I seriously just thought I was lazy or "couldn't be fucked".
So it could totally be ADHD, speaking as someone with severe ADHD who also did not know it was ADHD for quite a while.