I'm sure that if I asked 100 people to say who they were (other than their name) the majority would either say something they DO or else a condition - e.g. "an accountant", "a full-time Mum" or something like "a diabetic."
I retired four years ago - initially a nurse and midwife, then working with computers - same place for 26 years. When I had to retire I found this difficult as so much of my identity was in what I DID. I could also say "A Christian", "a hamster owner" and, later on "a rat-keeper". When I was landed with an official task at a regional club, that gave me a significance more than "just a senior citizen", "library volunteer" etc. - I was "Show Secretary - Rats!" Now I'm very probably laying this down, I feel as if I am losing part of who I am.
Do other people find this need to 'have a title' - not in a big-headed way, but to feed 'needed'? I may well learn to Show Sec for another rat group, and am also investigating a charity which teaches old people to use computers, to see if they need a volunteer. At last I've had it brought home to me that the benefits of what I'm doing at present are outweighed by the costs to my health - although a few Samaritans and Mental Health Matters staff are much more knowledgeable about rats now!