Mazzie screams, but she is very demanding by nature.
If Buddy screams I always go look, he never does unless something is really wrong and upsetting him. Of course, in his eyes wrong is simply another bird walking across the floor, but thats ok because they arent supposed to do that LOL.
Alice screams at night to be let out, which she hates waiting for. She gets to play in the bedroom until bedtime. That way I can be sure all doors are closed etc... and none of the bigger birds are in here.
Sage lost her last home from screaming, she nearly got them evicted, but she rarely screams here. Lots of cooing, and the occasional trash talking to the lovebird who she can see out the back of her cage, but not much screaming at all.
Homer hasnt screamed yet
Athena