If you met me, you would probably think I'm perfectly normal. But inside, I do have a quirk that makes me a tad different from most folks: on one level, I'm a control freak. This might surprise a lot of people who see me as reasonably laid back (except when I'm worried about my kids, and then I freak out).
But I'm a different person when I write books. It's not just being a writer that makes me different. Technology has made it much easier to write and to publish, which has revealed that gazillions of folks have that ambition. Some of them write hoping to make money, some write hoping for recognition or fame, and some write because they enjoy it. I write because I want people to read what I have written. Let me stress that—what I have written. What appeals to me writing stories is that by writing them as science fiction or fantasy, I control not only the characters but the setting. I can create my own worlds, each with its own appearance, environment, inhabitants, and cultures. And I can populate those worlds with whatever characters I think would make for an interesting story.
Hidden Magic, I gave some characters magical abilities, but plunked them down in a society that feared and suppressed magic. I made them brother and sister, and then, because I enjoy a romance, I had each of them find someone they loved.
In Tribes, I wanted my readers to inhabit a world where there was one overriding loyalty, at least in a legal sense. Belonging to a tribe was a a life-long and immutable thing. One's tribe provided security, a safety net against disaster, and also determined what was legal for an individual. On the other hand, if someone had no tribe, his life was doomed to slavery, drudgery, and degradation. Interjecting a slave into such a setting provided a way to see how the other characters behave toward him.