It is always worth trying to provoke a negative answer, since only then can you begin to trust positive answers. Works in both directions in interviews, in both directions in sales/clients meetings, with politicians...
The only position you'd hire a politician for is spokes person, simply to see which sort of BS you can feed them before they realise they're speaking BS.
Very old observation: can't buy Pathan fighters, but you can rent them.
The same is true of politicians, and that's the only sense in which I would hire them

(For non-native English speakers: "hire" can mean rent
or employ)
There have been a small number of cases where I and colleagues have explicity asked ourselves, "if we had been interviewing X, would we have recruited them?". We have had our doubts, even though we knew X was an extremely competent, imaginative and shy engineer. In one case X booked 25 hours to a project one day, since he came in at 9am on Saturday and left at 10am on Sunday; the fun and zany company accepted that
He also came into the lab on a Christmas day, because a problem was knawing at him.
I'm not too worried about shyness, but I am talking about really dysfunctional personalities. We had some people who were so paranoid that they password protected all their project files on network drives, refused to socialise "because we might steal ideas", and things like that. Their behaviour was an active nuisance towards everyone else to the point that it made it entirely impossible to work together with them. While I do like colleagues that I can go and grab a beer with after work, I don't consider that a requirement!
Once upon a time, the company I was working for was taken over and we were to be moved to another site 15 miles away in a revolting "new town". When interviewing us (i.e. engineers) individually, the new HR and CEO told us that we could go out with our co-workers in the evenings. We were all surprised by that
concept - while we got on well with each other, we all had very different interests outside work.
I prefer to keep work and play separate, since when (not if) one goes wrong, there's a high probability the other hasn't
