My wife (jokingly) informed me a while back that I'm not allowed to acquire any more hobbies.
In between CDing sessions, I like golf, guns, astronomy, hiking, reading, weightlifting, hockey, and when I have time, I play bass in a heavy metal band.
Currently between bands, as I like to say, since it's not easy to find a group of 50-somethings who still want to rock out like we did in the 70's & 80's. You're only as young as you feel though, amirite?