I try to create characters that I am fascinated by on some level or intrigued by or can't stand.
I let my characters do the talking, simple as that.
I like to think of what happens to characters in good novels and stories as knots--things keep knotting up. And by the end of the story--readers see an unknotting of sorts. Not what you expect, not the easy answers you get on TV, not wash and wear philosophies, but a reproduction of believable, emotional experiences.
My stories are character driven.