The thing I learned from working with Americans for a short while (I worked for an American company based here) is how culturally different we are. On the surface we share many things, but in some cases our values and beliefs are totally different, to the extent that on a certain issue a Brit and an American can just completely talk past one another. Healthcare is the obvious one, but it’s a lot more than that too.
And another thing is for the supposed leading nation of the free world, it’s a first world country in hardly any sense. Its level of inequality is gobsmacking.