My main wake up moments were two stage. I realised that evolution was true but, more important was when I found out just how much the Creation book was misquoting and bending the facts to make it's arguments.
Then when I realised that the Flood story was impossible, I also realised that it fit in perfectly with the view of the world of the time.
People often talk of the puzzle pieces falling into place, but sometimes it's just as important how the puzzle pieces fit together.