Personally I couldn't be a 24/7 sub. Firstly because we have kids about and normal life wouldn't allow it to be possible.

But i don't think i would like to be a sub all the time. I really enjoy being a sub at weekends and in the bedroom, even then you need to know each other extremely well and be happy to talk about your likes dislikes and absolute no no's so that you don't go too far.

Not really sure if that has helped in any way.