Interesting question SJ..

For me, I believe in guardian angels - I'm not religious - I don't believe in god. (I'm neo-pagan so its a bit different - I dont' class it as being a "religion" but more of a way of life with a different way of thinking)

Anyhoo... back to guardian angels. I know they are there. I've had them with me. I can feel them around me all the time. I've even had one stroke my hair during a panic attack on night at a strange motel when I was by myself and freaking out.

So yup, I believe they exist.