Bumble old chap you have made the very common error of confusing psychometric with personality tests. You don't believe the personality tests are accurate and fear you have been rejected on their findings alone. This is highly unlikely. Often the personality tests are merely administered at the first stage for convenience. Their real use lies in the next stage when they are used to direct questioning. This is certainly the way the RAF, BA and AL work.
Don't read too much into the questions. Everyone always feels that they don't want to answer YES/NO but somewhere inbetween or 'depends'. The bias of your answer is all that they are after not the thousands of inferences you may make form the explicit YES or NO reply.
If you are worried by bias or arbitrary decision making then you would be far worse off by eliminating psychometrics and reverting to interviews only. People are far more biased across a desk than any objective testing system. You just cannot help but bring your own prejudice into recruitment selection - trust me I've been on both sides of the desk!
You'll get there in the end I am sure. As an aside, lets all keep it civil over here on Wannabes shall we - there is something of a tradition of showing the 'grown ups' how to behave and I for one would like to maintain that tradition. Happy flying - WWW