The "Interview Portrait" is one of the most difficult tasks that I am asked to undertake. Of course it's easy enough to just turn up and shoot a picture, but actually making a proper portrait is a really difficult task. This portrait was frame 64 out of 73, frames 1- 30 were the safe shots and 31 - 73 were far more experimental.
The beauty of the interview portrait is that you know that as long as the subject and the journalist are talking you can carry on shooting. You normally have fixed amount of time so you can plan a strategy. Mine tends to be to divide the time up and shoot safe, tight, softly lit photographs for the first ten minutes or so. During this time you get to know where the eye contact is going to be, how likely the subject is to use extravagant hand gestures and how tolerant they are to flash.
If at all possible the photographer should seat everyone involved to give themself as many options to move around and get different angles, to get the right background and to be able to light the picture. The huge plate glass window behind him dictated many of the angles but the drama of the sky makes that a worthwhile compromise.