Yes. I already had/have braces on as an adult.
Yes. I am currently contemplating doing this in the near future.
Yes. Although I don't expect to ever need braces, I would do it if I needed them.
No. Not right now, but may consider it in the future if necessary.
No. Although I need them, I couldn't go through with it.
No. Although I don't expect to ever need braces, I don't think I would consider it an option.