Overnight at an airport

Got in to the airport a few hours before departure (5:10pm) at Buffalo yesterday.
The Buffalo airport is a little larger than the one in liverpool, but they have those nasty full body scanners which I don't think have yet arrived in liverpool, so I can't say I approve.
Met up with my friend who is traveling with me, David. We were lucky to be able to have enough seat choices on Delta to be able to sit together on all the airplanes to Japan.
There were some surprises at the airport however with checking bags. International flights to japan from america should be 2 bags free, but they originally wanted to charge $60 for 2 bags when I got to the airport because of the 12 hour delay between flights breaking them up to different days, the first flight not counting as a connection to an international flight.
I don't see why they can't get around it being on different days, but you know, they want as much money as they can get. Luckily we worked out baggage pricing and me and David were on our way to JFK. Pretty short flight, but then again we didn't leave the state.
Unfortunately, due to the overnight wait, they wouldn't transfer my bags so I had to go through airport security again.

So I waited overnight at the airport. Didn't want to sleep and leave all of my baggage open to other people, but we didn't have plans to find a hotel.
However we walked around various terminals and went to the wrong places or got slightly lost along the way, so it was a fun way to waste time. After most of the terminals had closed at around midnight, we ended up at a terminal with a strip mall inside. But it was a pretty gloomy place overnight, since everyone there was also staying the night so they were all tired or sleeping.
It was however very quiet. Except of course that we ruined that by talking for hours. So me and David are pretty tired from staying up all night, but we are waiting near the gate now for the flight that will take us to Japan. Just two hours left before the plane takes off and that will be my last time in America for several weeks.

I'm a bit worried about being stuck in another country where I haven't mastered the language. But there is nothing that I can do about it now, so I shouldn't worry too much and just get prepared fast.
The plane flight is quite long (with a transfer in between I am calculating 19 hours!) and the plane leaves at 7:30am. They have wifi on the airplane for only $12, which seems like a good deal considering the length of the flight, but then again I will/should be asleep for most of the flight.
It will be saturday in Japan when I arrive - funny thing about that plane flight is that you add a 13 hour time zone difference and you get a 32 hour plane flight! That can't be good!
But well, when I arrive I will also be 13 hours in the future compared to America. But I don't think that's enough to give me cool psychic abilities.
So in short, I leave at 7:30am friday and arrive 3:30pm saturday. And after clearing customs I will have until sunday before I meet my host family - which is what I am most nervous about.