I was diagnosed with ADHD when I was 19 but nobody really did anything with that information, and I to this day refuse to use it as an excuse for why I can or can’t do things.
I think it made parts of my life harder, and if I had ever ended up in a seriously bad place I would have taken it more seriously, but I very much didn’t want to define myself in terms of any one aspect of who I was.
Now, my adaptations make me an awesome combo of ADHD strengths with only the charming and quirky downsides, rather than the debilitating ones, and I am immensely proud of that fact.