I think i was born a geek.
Earliest remembered obsessions were my uncle Donald’s working steam engine models, toy magnets,
toy gyroscopes, static electricity you could see in the dark when you pulled your jersey off.
I remember starting a craze in Primary School for ‘twirling’ milk bottle tops. I had figured out that if you crossed your fingers, like you do for luck, then held the rim of the milk bottle top between the tips of your fingers, then flicked your fingers apart, you could impart a stabilising spin to the top so it acted like a mini flying saucer.
First superhero I remember was Superman in B&W on TV 'Is it a bird? Is it a plane? etc. a bit propaganda ridden but not as subtle or extensive as today’s.
Probably discovered the likes of Dan Dare in the Eagle before I got my first DC or Marvel.
Dr Who was pretty seminal although there had been other things like Quatermass and the Pit on TV before that. And a TV showing of Forbidden Planet circa 1959. I’d be about 8.
Then I got into the backlog of SF from the plethora of SF mags from America from the early 50s.
The first ‘big ideas’ SF I encountered was from British authors like Huxley, Aldiss and Wyndham but there was an American book which made a great impact on me ‘Earth Abides’ by George R Stewart.
I guess we are talking early 60s here.