They are the most generous, gregarious people on the planet.
I don't currently know a lot of them, but I knew a lot of them when I was in Bamako, Mali, in 1976-78.
A couple of anecdotes:
The Marines in charge of the Embassy security detail were horrified to learn that Canadian Thanksgiving was a full month before the American version.
Nevertheless they managed to scrounge up a fully-dressed bird for us. Semper Fi, guys.
What I remember the most about those filthy bastard Yanks:
The four-year-old son of the Canadian charge d'affaires drowned in his backyard pool.
The lights were burning long into the night in the US Embassy as they fought to keep their phone lines open to Quebec.
That's why I like Americans.