Where do the "permanent travelers" go?

I have one friend who's a permanent traveler.  While he spends time in a variety of places, his preference is Asia, with Thailand at the top of his list.  Chiang Mai is where we met and in nearby villages is where he spends the majority of his time.  He has a private income so work has nothing to do with his choice.  I'd be interested to see how the results of the survey would change if that element was removed from the equation.  And how it would change if broken down by age group.  Also, how would the list change if only those who had visited a wide variety of places, so could compare, were asked.  For instance, I suspect some residents went to 1 country and never went anywhere else.  Mexico comes to mind in that regard.