I was not born into a nerd family, at all. Dad was very much the 'manly' sort, cars, planes, sports. My birth mother - I have no idea her interests, since she passed before I could really know anything. Stepmom is super conservative in her hobbies - she has to be ladylike, so it's like scrapbooking, and making wreaths and things.
Brother and I had an Atari when I was still pretty young, because we lived in the middle of nowhere with not much to do, and pretty close to a highway. He always whipped my butt though, so I didn't play it much.
I learned to read pretty young, and would read as much as I was allowed. I was reading stuff inappropriate for my age pretty early, loved reading. When I was about 8 or 9, my brother picked up some comic books, and I read them when he was done, and that, as they say, was that. Played video games as often as I could (my folks would not get me a NES), did D&D, got into the horror movies... and never stopped.