I bill myself as a naturalist because if you say you're a naturalist, it gives people a conversation point to talk about what you actually do believe in, instead of when you say you're an atheist, and it's really just a statement of what you don't believe in.
The naturalist worldview is a good way to feel grounded and feel part of something that isn't based on fairy tales. It's based on observable facts in the human and in the biological history of the planet. I think that can be a source for comfort.
I don't mind if other people call me an atheist, but I call myself a naturalist. Atheism doesn't tell you much about what I do believe in; the term naturalist opens up the discussion better.
I call myself a naturalist as opposed to an atheist, but there are different styles. Some people just like to be close to nature. And some people actually worship nature, which is too wishy-washy because - like a lot of religious believers - they don't depend on facts.