I had an African Grey (Timney sp?). Never again.
My cousin bought it as a baby and worked and worked with it. Couldn't take the screeching. She gave it to me - I had it for 2 years before I gave up. Screeching at 3:00 a.m. gets a little annoying when you have to go to work at 5:00. Oh yeah, they bite also. Had to handle him with thick leather welders gloves, and even at that he could (and did) leave a mark.
People we gave it to 15 years ago still have it, though I don't know why...
It has mutilated a new leather couch, a recliner, a new mattress.
I'm surprised it hasn't become someone's dinner yet.
We have lots of pets, including a couple cockatiels (and llamas and goats and horses, dogs, pigs, etc.) so I understand working with their different personalities.
I would have to call that bird "The Bird From Hell"!
Then again, that's probably what my Father thinks of me!