Well, I actually can't decide between half of those things listed. I would definitely like to be a script writer, I'm always full of ideas I don't get to put on paper. I also take acting classes, which I love doing. Animation, well, that too I love doing, although I'd prefer to work with stop motion films rather than computer animation. Then, editor would be something really interestring, but I still have to learn more about that to decide. I have also considered being a voice actor (or dubber, which is more common here, but a bit different). And lastly, director, although I have the same worries of some of you.
And I'd probably work for movies, but maybe it could help to start with television.