In 8 years we have never felt the slightest melancholy for home. True, there are things we miss that we can't buy in Port Vila, simple things that can easy get at home, but that's totally different to being home sick.
We don't miss friends or family, it's lovely to see them when we do catch up occasionally. But don't need to be living on their doorsteps. I hope not too many expats suffer the blues for home.