Just curius what other stuff do you guys get up to when your not doing astronomy/weather/photography?

For Me;

Football - Play 5 a side twice a week.  At least it keeps me in some sort of shape.  Also support Arsenal and go to see them a couple of times a year.
Aviation Sims.  I fly historical aircraft in online war simulations such as IL2 Forgotten Battles.  I'm part of a virtual RAF squadron (No.56 Sqn Firebirds).  We meet online twice a week.
Computers:  My day job which extends into a hobby too.
Electronics:  I like to dabble and invent/break/blow up stuff.

I'll answer for Carl O'Beirnes too;