My TAG is pretty "quiet." He doesn't scream, and talks in a "normal" tone. He does whistle a lot, which can be pretty piercing but not annoying (not in my mind anyway). Timber is six now. I've had him for 14 months. While I know he has had an affair with a bell in his cage, he doesn't change his behavior toward us. I have no experience with Amazons, but from what I've read here on the forum they get a little more aggressive and moody when they get hormonal. That said, I'd still like to have an Amazon at some time!