Well, when I was (briefly) an exchange student in Cheshire as a fifteen-year old, I learned a few things, all completly subjective:
American accents are annoying. We speak with flat "a"s which are nasal and whiney compared to the English used where I stayed. Sorry, I can’t drop it.
Cops are not to be feared in England. Do what they politely ask and they’ll be on their way with a “thank you” and scarcely a second look. Obviously a generality, but English police seem to remember that they are public servants, and many American police seem to have forgotten that.
Music is better in Britain. Even the most annoying synth-pop had a sort of soul that so much American music lacks. Nashville, I’m looking at you.
But hey, it wasn’t all one-sided. I found a few things lacking:
English toothbrushes are stiff and painful.
England is seriously lacking in the smokeless tobacco department.
American cars are cooler. I expected to be jumping out of the way of Jags, TVRs, and Lotuses. Where the hell are they? Instead, the family I stayed with owned a Ford. I went to a car show–it was for Galaxie 500 owners.
And most importantly,
Where the hell is the effing Tabasco?