I don't like the term atheist. It's an odd and unhelpful way to describe a person. I am not an astrologer, but no one will see much use in describing me as non-astrologer.
I can spend all day listing all the things I am not or do not believe in. I am an a-hindu, a non-muslim, a non-window-washer and an a-leprechaunist .
I much prefer the term naturalist. This I have in common with all people, since we all live in the natural world and all of us study it from infancy until the day we die.
When we are driving our cars on the freeway we are aware of the laws of physics and we try to be alert as not to cause ourselves or others serious injury or death.
Hence, we are all naturalists.
Now, there are people who proclaim that in addition to the natural world there exists a supernatural realm. That's why I usually refer to religious people as supernaturalists.
And it seems to me that anyone who makes a claim like this has quite a bit of explaining to do.
Andrew