If you're controlling or self-centered - blame your siblings. The side-effects of birth order...

Is your older brother or sister a controlling people pleaser?

If they were first born, that may be the case. Birth order can determine a lot of aspects of our personalities. Here are the most common traits, in order:

• First born: Dependable, trustworthy and devoted. They also tend to whine and demand attention and seek approval from anyone in charge. Some famous first-borns include, Oprah, Rush Limbaugh, and more than half of our U.S. Presidents.

• Middle child: Secretive and more independent, the middle child often responds more to peer groups rather than the parents or the bossy first-born. Some famous middle children are Princess Di, David Letterman, Donald Trump and Madonna.

• Last born: Social and outgoing, the baby of the family loves the limelight. They are charming but can be manipulative or competitive. Famous last-borns are Jay Leno, Ralph Nader, Bill Gates and Steve Martin.

• Only child: This one enjoys being the center of attention but is sensitive to criticism. Only children can become quite skilled at pitting parents or friends against each other but in true first-born fashion, will go the extra mile for their approval in the end. Some famous only children are Lance Armstrong, Tiger Woods, Frank Sinatra and Elvis Presley.