Hm...first time I'm visiting this thread--I grew up in a UCC (in 3 choirs, taught in summer church school, etc.), and it was really my home away from home. I loved it there because it felt safe. I remember telling one of the ministers (all of whom felt more like family than my own) that I just didn't believe any of the stories told by the church, and he said, "it doesn't matter." He didn't expand on that, but I did continuing going, simply because it felt safe.
I finally left completely when I was in my 20s, and I've explored other things since: Buddhism, paganism, etc. Was even leader of a pagan group for a while and gave sermons at the UU Church.
I've only started considering myself an atheist recently. I attended a conference recently of primarily atheists and agnostics, and I never felt more seen. I think I fit in the secular Buddhist and pagan categories, not believing in a god or higher power.