I collect old toys.
When I was high school age and in my 20's, there used to be an 'old toy that my Dad and I would go to, so I guess that got me started. He has since died, but I still have the toys and still buy now and then.
I have toys from when I was young, and my husband (we're nearing 60), some toys from when his Dad was a kid and just stuff I picked up here and there. Oh, a few from when my kids were little too.
Prized possession? It's not a 'toy' but we have the child sized roll top desk and chair that my husband's Dad used. Plus his wire rimmed glasses and case inside!
I was talking to my sister a few months ago, and we each have our Barbies from 1962, 63?. We didn't know it until that time, but neither of us have heads on our Barbies?
Brothers!