I voted that I control my story, but honestly it's kind of a dance... I know where I want to go, but don't always know exactly how to get there -- I like to see what the characters think about it
But then, that's still me controlling it, since the characters *are* only in my head...
I used to just start writing and see where things went -- and in at least three cases, it went nowhere for a looooong time
So I've gotten away from that, the last few years. I need a plan before I get started, so I don't write myself into a corner. But I only plan out the big events, so there's still plenty of room for creativity along the way.
The one exception is when something just refuses to work. It might be a scene, it might be a particular character choice... but when it's just not working, I don't force it. Writer's block is my mind telling me I'm doing it wrong.
PJ