I may be a little bit different in my thinking--heck, so far I'm about the only person that has a lot of my stances on this board--but I'm actually a proponent of predestination. Now before the pitchforks and torches come out to maim me, let me clarify that I support it only to some degree, that free will does exist and indeed coexist with destiny. Almost seems sort of paradoxical, but I have a good analogy.
I like to think about it in terms of how I write books. When I write, I do not know precisely what's going to happen; I don't plan everything out to its most minute detail. I do however know the general overview of what's to happen as well as a few specific plot points that need to be factored in somewhere along the road. To me, those prefabricated plot points are moments where destiny takes your hand and leads you along, but I really only consider them to be events in your life, a choice that is to be made. Free will decides how to connect those events together, what we will learn from them, how we will proceed after they happen.
In short, you may know exactly how you're writing the story, but in general the nitty-gritty details of how the story will unfold is left up to the individual characters.
"There are some who call me... Link?"
"Carpe Gaium Domesticum!" (Seize the Cucco!)
Zelda: The Grand Adventures | Triforce MUCK ザ行方不明リンク
悪いユウモアの賢人