I kind of go both ways. I think everyone in their own way dictates what path they will take by their own actions. But I also think that there are certain people you are bound to meet and events that you will inevitably deal with.
Also, going on a more philosophical note on the subject, when you look back at how everything has fallen in place in your life or how something or some event has formed the person that you are today you can't help but think that this was somehow planned. How it was all meant to be.