I hate answering after Quora User because he takes all my thoughts and expresses them first and WAY better than I can.
So I am going to try a sneeky new technique of adding a few things to his full and brilliant answer.

1) Attitude towards "vacation" and "always on" work.

I admire the Puritan spirit of America and the determination to work hard, but as the economy rightly moves away from "effort" based jobs like manufacturing and more cerebral and creative professions, the importance of quality of time not quantity of time seems to be required.

Working in the USA I am amazed at people's needs to be demonstrably working about 18 hours per day and it creates two things.

- People often waste a lot of time and energy by responding quickly to things and by "keeping people in the loop". So emails flashing around at 11pm on a Thursday about a meeting on the next Tuesday is quite frankly a pathetic waste of time because people are keen to show they are working. Why people can't wait and discuss it the next day in person kills me.

- Quality of thought in creative endeavors ALWAYS beats quantity. We need to not be afraid to tune out and visit a gallery in order to come up with the good quality 2 hours thinking that can save 1000 hours of crap thinking and working towards something good. Let's take a nice 2 week break at some point in the year, turn off email, VERY few people are so important that it's impossible to find a way to manage this with notice, and if you are that important, that maybe something is wrong. Take that 2 weeks, get some perspective, set some goals, evaluate your life and maybe make some big decisions and see the light!

2) Acceptance of macro corruption.
I love many things about being here but Americans need to be really careful about the degree to which their national and personal interests are being swayed by those with the money and Influence.

When federal money is used quite so liberally to subside oil companies to drill hopeless discovery wells in Alaska because they can claim back 80% of costs, something is wrong.
When the richest are paying income tax only as carried interest at 15% and nobody seems able to even THINK about changing that, it seems a shame. Most countries would not be prepared to accept this level of self interest, they do accept it in other places, but nothing like the same bare faced cheek shown in the US.

3) Elevation of religion into education.
Creationism is taught in some states. End of comment.

4) Spiteful Politics.
It's really embarrassing to see the system of government "work" how it does, if a any other body of decision making acted this way, people would be astounded.You can't use the threat of a government shutdown as a way to get things decided.