I'm in agreement with lots of previous comments. I've had experiences that are currently inexplicable, but nothing about them encouraged me to think they implied the existence of deities, souls, an afterlife, and so on. Most of them likely were internally created phenomena (bit of undigested mustard, or summat). Some certainly stemmed from my own mind encouraged and/or manipulated by someone else (would explain the full size black panther that appeared on my bed when I was fifteen... girlfriend that was over-nighting was hella strong-minded). Other experiences - who knows? I'm agnostic on a lot more concepts besides gods.
And I like science fiction, seriously indulged in it when I was young, read twenty SF books a week when I could get my hands on 'em. If anything, writers like Dick and Delaney and Niven influenced my skepticism positively.