Avid collector of comic books and historical items (lots of old theater programs, vintage matchcovers, qsl cards, old menus, sports programs, WWII stuff, and on and on--if it's interesting and historical, I probably collect it), metal detecting (found my first gold ring this past weekend), buying and selling on eBay (my handle is nichewit), and, of course, cigars and reading (the two go together for me).
I'm also starting up my own non-profit, The Comics and Kids Network, through which I donate comic books free of charge to groups that work with kids. Currently waiting to receive my IRS 501(c)3 tax exemption. If you can find ways to turn a hobby into helping others, I highly recommend it. There's nothing more fun than sharing what you enjoy with others.