The "simple label" is that I'm an agnostic atheist - I don't think there's anything out there, but I don't deny the possibility.
I also identify somewhat as an atheistic pantheist. I find that I have almost "spiritual" feelings of awe, respect, and wonder when considering both the natural world and the world as a whole (not to mention the universe). I don't so much identify with the idea that "everything is God / I am God" as I do with the idea that the whole of the universe is more than the sum of its parts, and is amazing and worthy of respect just for being.
For instance, this video inspires incredible awe in me - it's molecular mechanisms, most of which go on in every one of our cells, constantly, and most of us aren't even aware of them:
http://www.xvivo.net/the-inner-life-of-the-cell/ I also love the Symphony of Science videos, like The Poetry of Reality (
http://www.youtube.com/watch?v=9Cd36WJ79z4) and We Are All Connected (
http://www.youtube.com/watch?v=XGK84Poeynk). You can probably tell that I'm a science geek and a Biology major lol.
Historically
I grew up very conservative Christian, abandoned that when I was 17 for a couple years of paganism, and then had a couple years of struggling to admit that I just didn't know before I could accept myself as agnostic. There's a part of me that would really like to believe in an anthropomorphic god or goddess, but I just haven't really experienced anything that would allow me to believe in that. Might be my science background, I analyze everything I experience - might just be time, I'm only in my mid-20s yet. Who knows.