Tim Copeland, what you refer to as "personal" is actually professional, namely how they conduct their business.
JK, it's a good thing asking for the kind of things you say you think is relevant is actually illegal to ask about in a job interview. Two of the most heralded (and talented) architects named in this thread happen to have been divorced. It's obviously irrelevant.
Actually, the best guide to how people really are and what they are like to work with is not how they present themselves in formal settings before the media or in job interviews. It's seeing how they treat and work with their colleagues, or better yet, how they treat service staff (waiters and waitresses, bar tenders, taxi drivers) in informal everyday situations.