[soham]

Plus, in many cases, it just doesn't click with the other person.

Interviewing is not a standardized test with a standardized evaluation. On the spectrum of human interactions, it's closer to a date, than it's to a test.

In doing interview coaching/training for a living (http://interviewkickstart.com), I see this every day. It's frustrating to a certain degree, but also very powerful once understood.