As a Baha'i and a former JW I can appreciate where the progression from believing in the OT god to rejecting it along with the printing company disquised as a religion that promulgated it. I too noticed the tendency to swing from one extreme to another. I certainly began to question it all as I searched for a better paradigm than I could find in christianty, I could never come to the conclusion that some form of intelligence wasn't behind the universe from the macro to the micro. I was an honest agnostic.
I have met many former card-carrying atheists in the Baha'i Faith and have asked many of them how they went from being convinced that there was no god to becoming a "believer". Every one of them, and there have been several, rejected the OT god but were as I attracted to the practicality of the faith we now share and its "definition" of an "unknowable essense" that is uncreated.
So for most athiests I have this in common that I too don't believe in the god they don't believe in!
Carmel