Spent 18 straight years in church, every Sunday sometime during the week. Read the Bible (NIV and KJV), The Torah, the Qu'ran, and studied Buddhism.
Found contradictions, lots of them, found discrepancies, different interpretations, outdated rules. Used logic. Studied the histories of all. Saw that it was a mix of madeup stories, mysticism and history. Saw how pointless it was. Moved away. I always had National Geographic and the like, and when there are people in church telling me that evolution didn't happen when there is evidence that did. It was a year long process, and a little stressful. But I'm an atheist now, whatever that means. I don't believe in any religion, I'm an academic, a Socialist and a feminist supporter. I work based on evidence and there isn't any for religion.