Only children are people who are pro-active : they mature early , they are dynamic,organised and conscientious , and they love facts and details , On the other hand , they hate criticism and they can seem far too sensitive to other people. As only children , they are often the centre of attention , so they can become angry if they don't get their own way... famous only children include golfer , TigerWoods , and pop stars John Lennon and Elton John.