Professionally, there was a change on going from London to Phnom Penh that was difficult to foresee: how each culture would approach a negotiation/argument. Different countries have different behavioural characteristics that is imperative to take into account when moving spheres geographically.
One of the most important negotiation tools is to be able to determine the confrontational and emotional expressiveness of the subject with whom the negotiation is occuring. Being able to detect that early gives an subtle advantage that can help reach the desire outcome if used well.
This HBR chart served as a useful ordering of that idea. And it seemed to fit with me personal experience of the nationalities whom I have encountered and negotiated with.