Some people have hobbies when they're children and as they grow up this hobby grows with them, and in some way it might form a part of their identity. For me it was ballet. I'm not sure how much ballet was a part of my identity, but I started when I was only five years old, and stopped when I reached year 12 because I wanted to focus on school. At its high point I was doing four or five hours of dancing every week.
I haven't done ballet in six years now and some time last year I realised that I missed it. I'm not sure what exactly it was that I missed. I certainly didn't miss exams or concerts, painful toes from pointe shoes, or getting changed into a leotard. I think part of it was that I missed my muscles feeling strong, that sense of posture that comes with ballet, and the friendships I shared with those in my class.