My greys I have had since weaned. They are flighted and do not pluck. They fly in my living room, birdroom, their aviary and kitchen. I do not let them fly in my office, bathrooms or bedroom. I do not have a schedule for when they are out of their cages. My TAG is the "boss" the other, the brute in the follower. Their choice. Both can talk, my CAG is the big talker, he sings and repeats just about anything I say. My TAG, only asks for nuts. She lets the CAG do all the talking. They come when I call, if they want to and both step up and if I ask if they want a scratch bow their heads for one. My TAG, shakes hands/feet if I ask. Both give me kisses if I ask. I do not let other people touch my greys although the TAG will land on other people's shoulders if she wants. The CAG, is a fraidy cat and screams like a banshee if anyone but me talks to him or goes near him. He thinks nothing of dive bombing a "predator" who dares come too near. He only comes to me. I live alone so my greys are very comfortable here and own the place.
My greys are not screamers, except the CAG, if he is nervous around a "stranger."