I have always enjoyed the more solitary activities. Running, weightlifting, writing songs, etc. Honing fits right in. I also love the action of stropping. I'm also a perfectionist.
I get to spend some time with myself, and work my way through a puzzle that I have knowledge of. It's also a solitary competition. Is this going to be sharper or smoother than the last.
It's a great way to spend a Saturday morning.