I am from the UK and just completed my first interview, and have my second next week.
My interviewer was quite relaxed, and very friendly. However I don't believe I made it clear what I wanted to achieve from the MBA and INSEAD over the short, medium and long term. He asked me to go in to quite a lot of detail on this matter, and it got me thinking quite a lot about why I wanted to do an MBA. My lack of clarity may have spoiled my chances. What I would suggest to everyone is be prepared, show you are focussed and have a clear idea of exactly why this is such an important part of your career journey.
He gave me a lot of good advice, for example, that I should try and complete my language requirements before the programme starts and that I should also try and secure an intership beforehand.
My next interview is on Tuesday, and this now becomes extremely important, as I need to show that I am focussed, however I fear the damage may have been done already!