When I first started writing my first book, I never really had any idea what to expect. I knew that I had the story outlined in my head and some notes. I knew what my characters were going to be and how they were going to act. Or so I thought! I never realized how little control I can sometimes have over my characters. I think that I know what they will do and then the ideas change as I am writing them. In a way this is awesome, but in another way it makes writing rather confusing at times. I am finding that this is happening in the book I am writing now as well. Overall, I think it makes it a lot more fun to write the unexpected.
Do your characters do what they want?