A good friend of mine has an Amazon, and its a pretty nice bird. It can get annoying to some people (not me, though). It also absolutely loves being out of its cage. Somewhere I heard the males are more talkative? Unsure if this is true.
One of my fathers friends owns a 4 year old macaw... I've been around it quite a bit, and everytime its just sat on its perch quietly unless my fathers friend calls it over to perch on his arm or to let it give him kisses. It does take it a while to warm up to people, and will bite if it doesn't know the person.
I know every bird differs, so the two larger parrots I've met might not act like others that other people have been around (as you already know^^).
I've never owned any bird other than a budgie and lovebird, so I can't give you any other advise other than that.
Good luck in your search! I hope to own a larger bird someday... not anytime soon, though.