Same here. I've travelled quite a bit, and I don't generally feel homesick, specifically. "Dissociated" is a word I use often. If anything, I'm 'homesick' for multiple homes: I am constantly missing Athens, Kiev, Tokyo, Berlin...

In many ways, constant travel is really wonderful: I'm almost always saying 'hello' to new friends, and 'hello again' to old ones. At the same time, though, you're constantly saying goodbye, as well...