My white Leghorn is kind of noisy. She is really sweet, but she wants out of the coop all the time and tells us so very loudly. She is not flighty or skittish, but I doubt she is a pure bred and that might make a difference. She hatched out of an egg from trader joes last year. She was part of a small mixed flock that started with 8. We downsized over the summer, and then lost one to a hawk so now we only have 3. She is the smallest of our chickens, but she is top hen currently. She lays pretty much daily, large to extra large eggs.
If you live close to neighbors, I would recommend considering a different breed.