I collected comics as a teenager. I have the first HULK comic ever made for instance. I did not do anything with comics again for decades, but recently have tried to use it to find a common ground with my 7 year old.

I collected martial arts for awhile. I did martial arts 27 years (Bruce Lee was still alive when I started). I have earned black belts in several systems.

I am now collected athletic achievements (I am in my late 40's). I won the state gold medal in masters swimming (50 m freestyle) this year, last year came in 3rd out of 10 in a strong man contest, and the year before that completed a triathalon.