Hanoi was different, and I instantly had a lot of fun there, but I definitely think the cycle is much shorter there. Quicker honeymoon period, but it will wear thin on you much quicker. I quite enjoyed one small book by a jaded expat.
Edinburgh was similar to Japan, probably owing to the fact that I moved there in Autumn, just as events where one can make friends are winding down, but the following spring my social life and happiness blossomed, and did so permanently.
It took 5 months to find my happiness in Seattle. I have a wonderful home, social circles, and I’m even the fittest I have been since I was a teenager, but I wonder if this is my new normal level of happiness, or just the honeymoon period and I'll turn into a grizzled expat or immigrant like in Japan. I don’t think it’s the same here because the culture is less alien and the cons are very different. Unhealthy food, violence, and expensive healthcare are the first cons that come to my mind, not monoculture, toxic work culture and impermeable social barriers. Furthermore, this is my fifth country I have lived in in five years. I learned every place has its pros and cons, and I have the experience that allows me to truly appreciate the great things here.
Whether this is my home for a couple decades , or the rest of my days, I think I’ll be very happy here.