Besides the topics that eyepopslikeamosquito mentioned, the generic 'what was your most miserable failure?' with a followup of 'what would you have done differently, in hindsight?' can give you some insight into a person's personality.
From the last time I had to hire someone, here are the generic questions that I asked:
update: fixed a typo.
In reply to Re: (OT) Interviewing a potential manager
by jhourcle
in thread (OT) Interviewing a potential manager
by radiantmatrix
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