I did attend many interviews- for a job of course. SInce I never tried to get to the B or D schools. The first job and the second (present) job came to me via an interview where I had a beard. Forget about the first as I had fairly good introduction or a fair recommendation (from a prefessional colleague and senior) if you like call that name. In the second one, it was with a person who had some adimiration for Indians though did not know much about.
I would like say one thing to the apsirants that consistency in words, actions and facial expression is very important. To achieve this, you need to cultivate the traits of what you want to be, by continuous practice. These traits would include fairness, concern for others, clarity in thoughts and words, strightforwardness in words and action, and all that makes a successful life.