These are not all, but some questions I've asked my interviewee were:
Due to the economical talk of recession Do you think this is a career which can last through the recession?
Working in this field what gives a person status/what are some levels of status?
Are you able to seperate work from home, how does work effect your personal life with friends or family?
Looking from an outside perspective how do you feel society views your field of work?
What inspiring words of motivation do you have for someone who wants to enter the same work field as you?
What is the most tramadic and the most amazing thing that ever happened to you on your job?
What are some obstacles you felt that you have faced in your life time and looking back now how did you feel you have overcome them?