Interview has gone well until:
Interviewer: So how would your friends describe you?
Boso: Honest, hardworking and friendly.
Interviewer: Honest? Do you realize that honesty can sometimes get you into trouble? Can you give an example when this has happened to you?
Boso gives a few examples. Intense questions about honesty.
Interviewer: So what would you have done differently, with the benefit of hindsight?
Boso: Well, maybe I could have been a bit economical with the truth, but I'm a terrible liar, so I don't bother with lying.
Agency: "I'm sorry, but you didn't get the job. They said that your honesty was a big problem. As a customer support engineer, they need you to keep their customer's sweet, they feel you will tell them things as they are, and they don't want that."
So I've learnt a valuable lesson. Honesty is not always a good thing.