I think it's a common issue more to "multicultural" kids rather than expat children. It's mostly a question of how adapted and integrated you are, on how much you have been immersed (as in deeply dipped) in various culture at a young age or young adult age. Many expat kids who attend int'l schools, barely speak the local linguo and rarely get the chance to mingle with locals save for the pembantus and drivers would not understand the issue you are talking about.
I agree.
Another trait I have is that I have a hard time forming long term friendships, as all my friendships at one point sort of ended when we moved. Sure I keep in touch with a bunch of them, but not much beyond the "hey how are things" message every now and then. I also have almost no attachment to material goods. Every time we moved, I lost a bunch of toys/furniture/instruments, etc, so none of those things matter much to me. Last time I moved back to Indonesia, everything I owned was in 2 suitcases, and even those things were more of practical nature (like clothes I need to wear right away) rather than things I have emotional attachment to.
Now that photos and videos can be in digital format, I can probably move with even less.
