For me, I have a growing desire to retire to someplace in the southern hemisphere, and spend the rest of my life looking at sheep or something. Australia, New Zealand or Argentina, preferably. Never been to any of those places; no idea why.
This was preceded of course by some internal imperative I felt after college to live and work in the Far East, and learn Chinese. Flew out here, scrounged about teaching English for a number of years, started out not knowing anybody at all. Looking back on it, that was kind of odd, actually.