Fuck, I know this feel.
I traveled (still travel even right now) a lot during my teens myself, wich is apparently not so common for a french guy.
I went to China, Australia, Canada, Mexico, Belgia, Spain (a ton of times), the UK, the Baltic Countries, the Neitherlands and so on.
And do you know what I concluded ? The world is exotic, but really, there's nowhere where I will feel out of my world. And it came to my self-realisation that there is no place where I will feel really at home. It's really a dreadful feel, so it explains this guy overall "don't give a shit" behavior, and also why he's not even trying to have a carieer anymore.