I have been fully involved in designing my stage shows; it's important to me to do something really unique and almost off-the-wall to bring the music and the visuals together. I love design and actually went to school for a bit for graphic design, so it isn't so much 'pressure' for me; it's a way to be creative, and I really enjoy it.
I used to be very controlling with visuals and editing, and I would pretty much craft the performances; now I have learned to trust the material and the actors.
Some things can be perfectly expressed by sound alone and images would only be disturbing. Other times, sound would be possible, but visuals are much stronger and closer to what I want to express and then again, they sometimes overlap perfectly.
It is so beautiful that when you watch the film, the marriage between the visuals, the music and the storytelling is seamless.
The visuals are equally as important as the music. It's all a complete experience.
The best simulator for spacewalking is underwater - it allows full visuals and body movement in 3D. Virtual reality is good, too, and has some advantages, like full Station simulation, not just part. Like all simulators, they have parts that are wrong and misleading: an important thing to remember when preparing for reality.