I'm the oldest in my family with two younger brothers and one younger sister.
There not bad people but they do have their flaws.
Example.
First brother (16) Can be a know it all twat and will never admit doing being wrong, even if you were to shove the answer in his face.
Second brother (9) Can be a real yap, but I taught him many things, example how not to act like a yap in online games.
Sister (13) Lets just say, "she isn't the sharpest tool in the shed and she does have her moments of sheer ignorance."