Generally flooring like this is laid along the longest wall. If there isn't one, it's up to you. Just make sure you measure it out beforehand so you won't end up with a last plank being 10cm or something. Same goes for the width. If you end up with the last one being a few cm, it's better to start with half a plank.
Aren't the director's decisions basically the same as the character's? I mean, they're fictional so the only insight into their character is what we're shown by the media (i.e. the director's choices).
Head bee.