Anyone crewed aboard a Megayacht ?

Hi All, Has anyone actually worked on a Megayacht. I was wondering what it's like. For all their size , the crew quarters still look kinda cramped. Do you crave privacy. What sort of hours do you have to work. What do you do in your time off . Do they allow you to play with the "toys" etc. etc. Any kinda insight would be nice , as I really have no idea what it would be like.