After being raised Methodist, I became a critical thinker in my late teens. I observed how people cherry pick from their book of sacred law (notice I did not say bible) or use religion as a means of manipulating others. Also, I noticed many contradictions and flat out wrong "facts" from the Bible that can not be explained away. Almost all of the meanest, critical, and narcissistic people I know are religious, the majority being Christians.
With all this information/examples I've witnessed, I decided to become a Diest. On paper I should be an atheist but I can't get myself to fully believe in their thought process. The nice thing about being a Diest is that we don't give a crap about recruiting people to our line of thinking. Also, we tend to coexist with other religions as long as they don't push their views uppon us.