I have a gray Saddleback Pomeranian goose that is the most laid back bird I've ever met. However, I don't know if that is a breed characteristic or I just got really lucky. She doesn't get upset by anything. She's from Holderread.
Americans are supposed to be pretty easy going. I've got two hissy Blue American ganders, but I got them as adults and they needed to be retrained. I'm guessing that they thought I would throw down their food and run when they rushed at me. We reached an understanding about that; they decided we could do it my way. There was no fight about it. I called their bluff and that was the end of that.
The Blues are very smart and have pronounced personalities. There is some honking when they see the food coming. Other than that, not a lot of noise. They enjoy being talked to and will stand there with their heads tipped, listening. They are big bluffers and I've seen them rush fiercely at someone whose back was turned, walking away, on the other side of the fence. But turn around and look at them, and suddenly they remember they are interested in something else.
My blues were bred by Holderread but raised for a year by someone else.
I would recommend both the Americans and the Pomeranian, with the following caveat: I don't consider geese to be the best pets around children, unless the geese are properly trained and the children treat the geese with respect and don't tease them. Some children are OK with geese, some are not. So think about it carefully, especially if the children are small. Geese bites hurt and geese aren't careful when they are grabbing at food.
Holderread sells exceptionally good geese and ducks. Metzer is supposed to have some good Buff Americans, but I think they are sold out this year. Other than that, you can possibly get hatchery quality geese from Metzers, which is fine if that is all you want.