I've only lived in HK for 5 years, and before that, some 30-odd years in my home country. Sort of felt like an outsider from day 1, in a weird way. I didn't pinpoint this emotion until the life opportunity came to potentially move overseas, after which I traveled a bit to test out a few places as potential relocation destinations. I tested Singapore, HK, parts of China and Japan and none of them grabbed me like HK did.
To me HK is home and I dread the idea of leaving one day. Not sure when that'd be, I guess my kids' school life will dictate this in a way, but I can't bear the thought of moving back to my home country even though my wife would love to.