Great thread.
I think I can pretty much blame my older brother. He was - and still is - very much a film fan and I basically grew up on all the 80s (and some 70s) horror and action movies and the like. Hell, he's even responsible for me being a Who fan (even though he isn't) by buying me a Who book for Christmas when I was 11. Even though I was aware of the show and had seen it before, for some reason it really caught my imagination and off I went from there. In the 90s he had a laserdisc player and a projector so I certainly got an education. By the time he eventually left home I was hooked and had my own tastes and peculiarities and obsessions.