I was raised Catholic, and I remember praying to God every night as a kid, and it was definitely comforting to think there was some higher power watching over and protecting me, but as I got older it stopped making any sense. Of all the different gods people have believed in, why are all the others false but this one is real? Without a satisfactory answer I can't continue to believe in something that doesn't make any sense to me. I don't believe in any of the different gods mankind has worshiped, nor do I see any point in the agnostic approach, so I guess that makes me an atheist. It has nothing to do with science, and it isn't a choice.