Prepare a number of relevant examples. Make sure you feature as the instigator, or the factor that made the difference. Examples must lead to significant organisational benefits; making money, saving money/time, improving quality, anticipating or creatively solving problems, winning/keeping customers, improving efficiency.

Identify the two or three main issues and say how you'll deal with them, which shows you can focus on what's important. Emphasise your personal strengths that are very relevant to the role requirements.

Tell the truth. You are you. Your parents are different people. Your parents have no bearing on how your value should be judged. Avoid reacting in a defensive, judgemental, ashamed or critical way. 

Avoid anything deeply personal or seriously emotional unless you are in complete control of your feelings about it. Try to prepare an example that's work-related and relevant to the role.

Don't get trapped into admitting to a temper or loss of control. Say you tend to get more annoyed with yourself than with other people or other situations. Annoyance isn't very productive, so you tend to try to understand and concentrate on finding a way around a problem or putting things straight.

Prepare this as one of your strengths, as there's not a single job that won't benefit from good adaptive communication skills. Give examples of how you've been detailed and given written confirmation for people who need it. Give examples of how you verbally enthuse and inspire the people who respond to challenge and recognition. Think of other examples of adapting your style to suit the recipients. Give examples when you've had to be task-driven, process driven, people-driven, and how you change your style accordingly. A chance for you to truly shine.