I believe are lives are determined. 'Planned out' gives the impression of somebody doing the planning, which I disagree with, I simply don't believe in free will. My decisions are based upon my emotions, these, in turn, stem from every experience in my past, thus, I cannot be in control. It's impossible to shape one's own emotions, and therefore it seems to follow that, if you can't shape the very thing which influences your decisions, your decisions are no longer free.
Free will is a strange concept; it asserts 'acting without influence'; but that raises another question. If you're acting without influence, then you appear to be acting randomly, if you're acting randomly, then there's no way you're in control. Every action has some influence behind it, if there's influence, there's no free will.
In the most simplistic terms: I do things because I feel things, and I feel things because of what has come before the very moment in question. It therefore follows that our lives are each hypothetically predicable, if only we had the capacity to know everything about one's life.