Hello! I realize I'm chiming in quite late in this discussion... but better late than never, right?
I have a 10 year-old blue-front amazon (Earlyn). She is my second bird--my first was a cockatiel when I was younger, but Earlyn is the only bird I have owned as an adult (other than a white-crowned pionus that I just adopted a couple of weeks ago). I met Earlyn at a friend's party one summer. Her owner then (second owner) thought she was a male African Grey, so he named her "Earl" (as in Earl Grey tea). I didn't have the heart to rename her a third time (her first owner named her Corky), so we ended up with a feminized version of Earl = Earlyn. It's really funny by itself, but it's REALLY funny when she tries to say her name (eeeerrrr.... EEEEERRRrrrr.... EAAAAAARRRRRLLLLLLL....!!!).
Anyhow-back to the story of Earlyn. Her owner was moving to Oregon and couldn't take her with him (he said he was worried she wouldn't survive the move; mutual friends later told me he just couldn't handle her behavioral problems). She was absolutely a handful when I got her. Biting, aggression, mistrust, fear of water (she was punished with water bottles by previous owners), hatred of unfamiliar people, and SCREAMING!!! Oh, the screaming. I went through 7 roommates in 5 years (and now thankfully live alone). I've had Miss Early for six years now... and she's absolutely amazing. These days she'll have an occasional little screaming fit or temper-tantrum (mostly over food or for attention), but for the most part she is an intelligent, affectionate little love. Her demeanor towards new people has really changed for the better (she presents her neck for scritches!), and she is HILARIOUS.
I only tell you this to illustrate that amazons can be both a delight and a nightmare. I wouldn't trade her for anything in the world, and the years of tears and frustration are more than compensated by the level of trust and companionship we have now. I blame the ignorance of previous owners and bird puberty for a lot of the behavioral issues, but from what I've heard, these types of issues can happen in any household with any bird. With an amazon's tremendous noise-making qualities, and their painful, vindictive angry bites coupled with a tendency to become easily over-stimulated... they can truly be a handful when they're being rotten. But if you are very patient and are willing to work with one... they're just amazing.
