I didn't know it at the time, but our time in Greece marked the end of my childhood. By eleven I was struggling with real issues that are known to mark the teenage years. The desires of childhood were quickly being replaced by a deep feeling of alienation and cultural dislocation.
Psychologists refer to this as "Reverse Culture Shock". It is experienced by those who return to their own culture after having lived aboard. I cannot say what life would have been like had we not lived outside the US, but I can speak about the feeling of dislocation that I felt upon my return.