What about low moments?

That’s an easier question for some reason.  The worst moments have been saying goodbye to people, especially when I’ve spent a lot of time there and have no reason for leaving except to ‘move on’.  The loneliness in the few days that follow a big departure is torturous.  Leaving Goodbye Lenin Hostel Zakopane in Poland, saying goodbye to the apartment in Bishkek and waving Luke off to the airport are three such examples.