Left it behind after nineteen years
I was more or less atheist because my parents didn't teach us any religion and although surrounded by Christian neighbours I embraced rationality and a scientific outlook and distrusted the irrationality in religions.
So this never changed but around the age of 15/16 I started searching for a philosophy or worldview that I felt represented reality. Without finding it myself, it found me at the age of 20. Which is when I began meditating and gradually turned into a panentheist.
So, although I still don't fit into the sphere of religion, I'm no longer an atheist or agnostic.