I have a year-ish old Quaker and he's everything I want in a bird. He's so goofy and entertaining, loves nothing more than to be as close to me and my mom as he can get, and communicates so clearly.
He doesn't yell much-- if he does it's in response to the blender, vacuum, sewing machine, or something equally noisy. Mostly he talks to himself and sings (old mcdonald, twinkle twinkle, I love you, I'm a little Quaker). He loves his cage and isn't bothered by me moving toys around or cleaning it-- he's only possessive and aggressive if I'm handling the bowl where he gets his fresh food daily. It's has favorite thing in the world! He's a great eater-- pellets, sugar snap peas, green peppers, and corn are his favorites though he also likes sweet potato, broccoli, hard boiled egg, apple, carrots and I'm sure other things I can't think of at the moment.
He has started nest building and he has a seagrass mat for his "bed" in an upper corner of the cage. He weaves straws and finger traps into it, as well as popsicle sticks. He takes it apart pretty quickly so it's not over the top yet and seems to provide hours of fun for him.
He does like to destroy softer wood and paper and is an expert at untying knots. A small piece of leather with a whole bunch of knots will entertain him for a while.
Unlike CNYGUY's quaker, my boy is a scardy cat. He doesn't investigate anything new or that he hasn't been introduced to by me-- he won't even go in the drawer where the toys are kept to pick something out because it's not a level surface to stand on I guess? Some new toys are immediately good, others take weeks to warm up to. My mom was in the hospital and came home with a walker and now Riley hides in his bed whenever she walks up to the cage because the walker is too scary! The benefit to this in general is he never goes on the floor and he only lands on his cage/designated perches when he's flying around the house. He gets treats if he goes to his cage to poop, so 90% of the time he does that and the other 10% he poops on my clothing haha.
I don't know about interacting with other birds, but Riley has done great with friends and family visiting. My nephew (11) is on the autism spectrum and has ADHD so he's not great at reigning in his energy when interacting with him. I create very careful buffers and rules for him and he still always pushes Riley's boundaries, which means he's had 2 gentle warning bites. On the flipside my niece (3) is super quiet and meticulous and she can hold her hand out flat and Riley will super gently take a treat from her. He will play peekaboo with anyone, so that's the best ice breaker.
He does beak my hands if he wants something and I'm not doing it, but I tell him to be gentle, redirect towards some training or deposit him back on his cage depending on how bossy he's trying to be and how much training we've already done. So far he hasn't picked up any bad habits-- he even unlearned nipping my mom after she didn't respond very well to it in the beginning.
He's both a brat and total sweetheart and we love him to bits! Hope that helps your decision a bit