Any exciting projects you've been working on lately?
What part of this job/role do you personally find most satisfying? Most challenging?
What are the major frustrations of this job/role? (Not sure if we'll get honest/complete answers to this one from employees; maybe it's more suited to non-paid users, or to an interview that won't be publicized)
If you could do things all over again with the knowledge you have now, what would you change?
Do you have any advice for someone interested in this field/job/role?
Are there any written materials you suggest prospective __________s read? (Aside from the pertinent policies/guidelines, if the interviewee is a community member such as an admin)
What abilities or personal qualities do you believe contribute most to success in this field/job/role?
Do you have any special word of warning or encouragement as a result of your experience?
What are your long-term goals / what is your long-term vision for __________ (e.g., the MediaWiki codebase, the WikiProject, the business development department, or whatever else the person is involved with)