Hi Martin
Agree with the guys about the first shot benefitting from being less 'posed'.
As for the last shot you asked for comment on particularly; I can see why you keep coming back to it: it has a sense of dynamism doesn't it with the opposing static and dynamic movement.
I think if the angle had been different then you'd be on to something. As it is the two figures left and right tend to border the shot which lets your eye slip straight through to the taxi driver, whom isn't that interesting.
The interest is with the facial expressions of the two other people. Obviously you can't go back and shoot it again but I thought I'd offer my opinion.
Drew