Used to collect all sorts of things. I still have a fossil and rock collection from exploring the Yorkshire coast and various quarries. I also used to collect coins, tokens, military cap badges and medals. Eventually this evolved into a friend and I running a market stall at Beverley Market, buying and selling all sorts of bric a brac. It was at a time when old postcards(mainly Edwardian) were cheap to get hold of, and they were starting to become very popular. We sold thousands of them, occasional ones made out of cork or aluminium. Some of the things we sold were fascinating, and, to some extent, I regret selling them e.g. a complete Daily Mirror issued on the day after the Titanic sank, a diary kept by someone who took part in the Boer War, small parts of an airship which sank in the Humber. I still have a small collection of coins(mainly early milled crowns) and a small selection of early postcards. Unusually I have a small collection of Victorian and Edwardian breavement cards, and, although I think I have mentioned this before, I discovered I had a vinyl LP of the Beatles 'Please Please Me' in stereo, which turned out to be the first ever issue, and is ranked in the top ten rarest vinyl discs.
Nowadays the nearest I come to collecting is 'birding' where I keep a record of every bird species that I have ever seen in the wild, both in the UK and abroad.
For me, I suppose, collecting is in the end just a means of learning and discovering more about the world about me, both by looking at human artefacts and natural things. It's like a stepping stone which can lead to any manner of ideas and personal discoveries.