I'm still not accustomed to being back.  The thought occurred to me today that it took more than a semester to feel at home in Berlin, so it ought logically to take a similar amount of time to get accustomed to the USA again.  That was kind of reassuring at first, because it takes the pressure off.  It means I don't have to feel comfortable and well-adjusted right away.  It will take a while no matter what, so I shouldn't feel obligated to feel at home already.  But then I thought, this is going to be an uncomfortable semester then.