All stereotypes will falter when specific individuals and groups are cited; so much that is American does not typify the U.S. The Amish, academe, scientists, many in the arts, and so many more categories don't mirror Americana at all, or these days nor do farmers. But here are a few points:
1. For good and ill, we are a notably young nation, except for Native Americans. We are all about the present and immediate future, and achieve a lot and fail a lot from that.
2. We are an extremely wealthy and privileged nation, that both reflects our energy and innovation and brings on our limited perspective and self-focus.
3. Our "history" as it is written and taught reflects a fairly narrow slice of the peoples involved, and this is slowly being revised, with great reluctance and uncertainty.
That's it. One time at a bed and breakfast in the Lake District (where Lakeland blends come from) in England, my late wife and I were having an after supper tea in the parlor. An older woman said behind her hand to her friend, "Well, they certainly don't seem like Americans." I could tell, this was, from her perspective, a compliment. We were both Americans of six or eight generations.