Railways, real and model; reading, films, computing, cooking, photography, pets...and generally trying to make the world just a little better, mammoth task as this may be...
On a similar theme, I have just modified the software on my home made Infra Red Detector train detection system. It can now sense a SWMBO at 5 feet! It's now quite useless on my shuttle circuit but I'm seriously thinking of installing 3 of them in my back garden on the way up to my shed! ;-)