I have been a spiritually and magickally minded person my whole life but never knew the word for it until I was six years old. When I realized the word Witch applied to me it was a feeling of coming home. I am somewhat solitary in my practice and while I do not consider myself Wiccan, I have utilized some information or recipes from Wiccan books and other similar sources.
Indeed, gathering knowledge and magickal practices from several cultures can make a person into a rather well rounded Witch. Truly to be a Witch, means you are a person who uses magick in your life. It is so much a part of you that there is no separating one from the other. Strictly speaking, you do not need to believe in any gods or deities of any sort to be a Witch. You simply need to believe in yourself.
To me, the practice of witchcraft is a very personal one. No one does it exactly the same way and all of us are capable of living magickal lives. I don't go in for painting any particular version of the craft as more valid than another. The one that speaks to your own heart is the one for you!