Whilst Americans tend to be the most polite and courteous people you could ever wish to meet they are, without doubt, thick as fu.ck.
I was once asked where I learnt to speak English and when I replied England they were confused as they though we spoke British. I should add that said person wasn't uneducated.
When in Rome, in St Marks Sq, an American stood next to us said to her friends "Gee, just think what Disney could do with this place". Sums it up for me.
I used to love going to the States, and did so often, but cannot ever see me returning to a country where the right to arm people with assault rifles is deemed more important than the right to healthcare.