I think everyone has a style of some sort. The problem is, not everyone's personal style is all that stylish. To have style, I believe you have to have confidence in who you are and what you want your image to say, or not say. When you wake up in the morning and pull an outfit together you have a question to answer. Who am I going to be today, and what do I want people to think of me?
Your style is whatever your answer to that question is. The choices are endless: ladylike, biker, slob, preppy pearl girl, or major slut to name a few. The choice is yours and the body is a canvas.
Now, having a good personal style, or to be qualified as a stylish person, is another thing all together. There are few woman who can style an outfit like Kate Moss or Grace Coddington, but many who try.
Having good personal style is something you have to acquire over time. I believe it's partially something you're born with and partially something you learn. Whether you rock the same look day after day, or have an eclectic sense of styling, the key is making it look effortless and yours.
Clothes are an accessory to us, not the other way around.