Exactly what I have believed since I was old enough for rational thought. I went through years of pretty intense religious upbringing, all the while knowing that there wasn't a god. I didn't say not believing that there was, rather knowing that there wasn't. It just doesn't make sense.
Why would some supreme being worry about what I did in my day-to-day life? If such a being were omnipotent, why would we have cancer? If he were perfect, why would babies be born with birth defects?
Yeah, I know, I have asked those questions before and been given the same like of bullshit. Those who spread the word are adept at rationalizing everything. If a car crashed and kills three people, then it was god's will. If one survives, it was a miracle, the grace of God, despite the fact that two other people died, God was looking out for one of them.