For me it was my Grandfather's Horace Kephart and 1930s Scouting books, at a young age. Interest was then encouraged by my father who was an outdoor writer in the 1970s, so we were always camping and trying out new kit. I wanted to do something less comfortable for some reason so, as a "Greenhorn", would shiver my cold, spooky nights away under natural lean-to shelters in the garden, and without any ground insulation, until I slowly learned things along the way.
Then I watched "Hell in The Pacific", with Lee Marvin as a downed pilot on a Pacific island and my father gave me his old helicopter survival pack - and I was hooked! Off into the jungles of wildest Somerset, throughout most of my school holidays. A few other books followed and then training with an ex-SAS chap, quietly-spoken and really knew his survival stuff, throughout the 1980s. I walked alone for miles at night across Exmoor and the Lake District, from one "RV" to another, always with survival-tasks to carry out and constant revision and testing, all under his patient instruction.
I was also fortunate enough to be given a load of old parachutes and survival gear by the RAF survival school (RAF Mountbatten), including a brand new-in-the-box Wilkinson Type-D survival knife. So, parachute shelters became my new home from home and flying rations were my staple diet!
Later on, Lofty Wiseman and his book became a further inspiration and thereafter I was lucky to have many opportunities to try out what I had read and learned.
I spent much time in the jungles of Borneo and Belize, working with and learning from the people who live there and practice jungle-craft for real. My efforts to achieve the same standard as theirs usually didn't work out as well but it was a superb time of doing what I had only read about in the jungle books and seen on Robinson Crusoe too! I am now keenly awaiting 2 books on Swedish bushcraft and survival by Lars Falt to arrive; and so it continues!