Hi there! I have 2 - 25yr old greys. I have had one for the 25yrs (female timneh) . And other for the last 6 (his previous owner passed). A male Congo.
I can tell you they are both amazing, kind souls. However they can both get quite loud. The Timmeh I have had all through college, first marriage, raising my kids and now my second marriage- she has picked up on all sounds. She makes an annoying click sound when she wants to go to bed- it’s loud. On the other hand the male- sings opera- and laughs and thinks he is funny. He imitates the kids voices and my voice and messes with my husband. I really think for an Appartment they maybe be too much, but all of them are different. They are in my opinion the best parrots ever (adopt though please). There are too many people to get them and can’t handle it. So many in rescue if you decide to peruse. Good luck.