I am curious to know what hobbies surround all of you cartographers!
As for me, my most predictable hobby is collecting D&D materials (maps baby). I don't play, but I have an extensive collection of pre-1985 stuff including most everything published by the judges guild, everything published for the greyhawk setting (including some pieces owned by the TSR employees), and every world setting produced by TSR (and a few by WoTC). It is not something I get to show off often!
My other hobbies are:
Book (fantasy and SF) collecting (first edition hardbacks).
Coin collecting (my biggest time suck after maps).
An occassional CRPG
And chasing my kids around (they win out even over maps)
So, what do you guys do when not making maps?