Mother Earth. That seems like the best common denominator. After that, I love using the phases of the moon to represent the 3 aspects of womanhood, maiden, mother, crone. When I found out that the new moon looked like a D for Diana, the Virgin, and the waning moon looked like a C for Crone, that was wicked awesome!
The yin yang aspect of life is very impt to me. I really honor the god as much as the goddess. If the goddess sustains, the god is the energetic creative force. Therefore, I love the horned god, and the sun god.
Since I was so upset when I learned how sexist the bible is, I would never just focus on women only in my own take on religion. that would just be doing the same thing in reverse. I once went to a party/circle with a bunch of young "witches" who seemed to be a bunch of men haters, and I was really turned off by them. They seemed to be witches to justify hating men, and to shock their parents.