Why is it that the 4 genin teams have the same kind of people:

1st member: very energetic and loud, wants to prove him self

2nd member: quiet, thinks hes the best, and is bottled up inside about what they really want to do

3rd member: the girl, not really there for anything except for getting beat up, and standing around

could anyone tell me why he made his characters the same, or is it the creator has a mental problem with choosing different personalities for his characters