Another pinball owner, but I've only had two. I like the EMs from the 70s, but I'm looking into getting an early solid state pin when a nice title pops up on craigslist.
Also unicycles... I have a few, been getting into distance riding lately on my 36in. I'm into juggling (haven't quite mastered the 5-ball cascade yet), slack-lining, fixies and the usual nonsense as well.
Still play with LEGOs, too, but that should be a prerequisite for any full time roboticist.
Lately my main 'hobby' has been buying a new house.