i sat the OPQ last week and felt like the questions were forcing me to contradict myself - even though i thought i was being honest throughout. well actually, there were some where the answers were equally applicable to me, in which case i put what i thought they'd be looking for. this seemed fair to me.
Despite advice from NATS to be honest throughout?
i only completed about 70% on the diagrammatic test and surely made mistakes there (i.e. rampant guesswork).
Despite the test instructions advising to avoid wild guessing!