Okay, like a lot of other mongrel-Americans I'm part German, but I've gotta say, whether it's San Francisco, Tokyo, Shanghai, Lhasa, or Bangkok, German tourists are the rudest, most obnoxious tourists on the face of the planet. They shove, curse, and trample, because you are In Their Way and this is Their Planet, after all. Or something. All I can say is, never have a shoving match in Tibet with a German tourist over a luggage cart, because even if he has to beat you over the head with his matched leather luggage, he'll win.