Your other obsessions or hobbies?
The great Winston Spencer Churchill.....
Only 8 more companion volumes and 2 volumes of war papers to go now....
My collection of volumes of the 'official' Winston S. Churchill biography has taken me a few years (on and off) scouring s/h bookshops and charity shops and ebay to get this far - avoiding the vastly inflated prices some volumes go for - all 1st edition English editions (except vol 1 of the war papers). Along the way I have picked up duplicate volumes that were in better condition and donated the old ones to the local library. (Nothing scruffy though.)
Martin Gilbert started as a junior researcher - employed by Randolph Churchill - in 1962 and took over as the biographer when Randolph died three years after his father (Winston) in 1968. The work was still continuing in 2000. I am not quite sure if Gilbert has any more additions to make now though.
I think the biography still holds the record as the most extensive ever.
I will probably have to 'bite the bullet' one day, skip a hifi upgrade, and pay the going rate for the Vol V companion parts. (They go for £hundreds per volume as there were less printed).
I also have 'History of the English speaking Peoples' by the great man and his history of the second world war and a few other books by and about him.
Oh and I love photography as well. (Though usually to a higher standard than the pics above.)