If you find yourself asking for hardcore proof in the existence of said power, you simply don't believe.
I found myself questioning the existence of a higher power since 16.
Therefore, I am an atheist.
Questioning seems perfectly natural. You can be questioning and still spiritual. But, if you decide that it is not possible for you to know, you're agnostic - not an atheist. To be atheist, you claim to know that there is nothing.
To address the larger current topic, I myself believe in God. And I keep it simple. What I believe is basically summed up in the Apostles' Creed. That's what's important. The controversial hot topics of the day? Do whatever you want, doesn't concern me. Organized religion? Mmm... I take the stance of Homer Simpson. I'm a good person, I try to live my life right. Why do I need to spend my Sundays listening to some old Italian man tell me that I'm going to hell? I do consider my self to be Roman Catholic though. I have some Italian heritage and I appreciate the family traditions and celebrations associated with the sacraments and such. I'm more of what you may think of as being a "cafeteria Catholic".