MSW - I also collect certain coins. Used to enjoy gardening (or more, digging) when I was younger, and through that I found a hoard of roman coins in an old wooden box and gave them to Manchester Museum, also found a 1904 coin in my grandparents old garage, which was a great find.
These days my hobbies include games, music (love it) researching various things which will never help me in life properly, input devices (mice, too) i'm half audiophile too I guess, but don't have the funds to express this properly, got a pair of bookshelves and some standing speakers, and a pair of HD555s for my music when the parents go to bed, they also help for games too. Reading is something I enjoy, same as writing, but I do both less than I should. Cycling was a big hobby for a while over summer, too. Urban Exploration is something I also find fasinating.
At the moment though, it's friends. I've not been socialising as much as I should have done over the last few years, so need to make up for it now. Winter is fast approaching, however, so I imagine I will get back into games properly then, but the life style isn't all it's cracked out to be.
Nice to see some audiophiles around here though, and that you've brought new websites for me to look at - i've been making do with headfi.org for some time.