Mom believes in god, pretty strong Catholic; both sides grandparents quite strong Catholics. Dad agnostic, but I never knew until I was late teens.
I never did believe. It was just another myth like Santa Claus to me - doesn't exist, but people say so a lot. I can't recall any time ever when I believed. It simply didn't take.
Oh, and another look into the atheist viewpoint - to me, the world is a miraculous, incredible place - not because of any god, but just how everything has grown, from evolution to history, the unbelievable things we humans have accomplished, etc. It's really just an incredible place to stand, and see all that we have accomplished, how wonderfully so many things fit together - and not for any master plan, just for self interest and our unique ability to learn from past generations mistakes. It's really an incredible universe with or without a belief in some master planner. To me, it's more incredible and beautiful without someone sitting there putting all the pieces together. Kinda the difference between seeing a pool table go from it's initial state to a state with the balls all in the pockets by the cue ball hitting just right, and the laws of physics taking over, versus the big guy in the sky just picking up each ball and putting it in a pocket. To me, the first view is more incredible. To others, the second view is more comforting and incredible. Not that that matters - it's about what you believe is true.