I would like to have a talent that made people happy. Being a celeb for the sake of being famous and the centre of attention would seriously freak me out.
Taking the career choice that Robin William's did would give him some way of using his manic energy. He could also hide behind his public persona when he was depressed. It is a complicated illness and everyone is different as to how it effects them.
I would hate to be a celebrity, or even worse, a member of the Royal Family.
It must be awful living your life being watched all the time, and worrying that every little thing, from picking your nose , to the wind blowing your dress up , is going to be all over the papers the next day.