I just Googled (again! Cos I'm procrastinating from finishing my Physics Light work.) about birth order. 

Every child has a syndrome are you kidding me?! As if I wasn't already worried about being a Mom now they throw this into the equation, let's all not have kids for the better future of people!

• Child Pampered and spoiled.
• Feels incompetent because adults are more capable.
• Is center of attention; often enjoys position. May feel special.
• Self-centered.
• Relies on service from others rather than own efforts
• Feels unfairly treated when doesn’t get own way.
  May refuse to cooperate.
• Plays “divide and conquer” to get own way.

• Is only child for period of time; used to being center
  of attention.
• Believes must gain and hold superiority over other children.
• Being right, controlling often important.
• May respond to birth of second child by feeling unloved and neglected.
• Strives to keep or regain parents’ attention through conformity. If this failed, chooses to misbehave.
• May develop competent, responsible behavior or become very discouraged.
• Sometime strives to protect and help others.
• Strives to please.

• Never has parents’ undivided attention.
• Always has sibling ahead who’s more advanced.
• Acts as if in race, trying to catch up or overtake first child.
• If first child is “good,” second may become “bad.” Develops abilities first child doesn’t exhibit. If first child successful, may feel uncertain of self and abilities.
• May be rebel.
• Often doesn’t like position.
  Feels “squeezed” if third child is born.
• May push down other siblings.

Youngest Child

• Behaves like only child.
• Feels every one bigger and more capable.
• Expects others to do things, make decisions, take responsibility.
• Feels smallest and weakest. May not be taken seriously.
• Becomes boss of family in getting service and own way.
• Develops feelings of inferiority or becomes “speeder” and  overtakes older siblings.
• Remains “The Baby.” Places others in service.
• If youngest of three, often allies with oldest child against middle child.

I feel so stressed now. Coming from a family with 2 other siblings, I can attest to the accuracy of this thing. MY SECOND BROTHER DOES TRY TO DO DIFFERENT THINGS. He never admits it, but I bet it's just so people will notice that he's there.