I have a houseful of parrots, so they do have each other to gab to. Some are in cages, some are not. Out of the bunch, I have one Timneh, Tuchis, who is 15 and has been with me since he was 4 months old. He would be my shadow if I let him. I have five Congos, Clancy, Aspen, Smokey, Seymour, and Chevey. All of them came from previous homes and are a little different in temperament.
Clancy was the first to arrive after Tuchis and was 16 when he arrived. His only other owner was dying of cancer. She was a bit afraid of him and only handled him when she had to, with welder's gloves. He has been with me for 8 years now. He does not like to be held or touched and will only step up for me if he is on the ground or in trouble (read on someone else's cage by accident and needs help). He absolutely adores it when I talk to him and loves to talk back to me. I pretty much let him do his own thing and he likes to stick to his cage for the most part. He has a broken wing and cannot fly but likes to walk around on the floor and explore a bit. He's a fabulous bird but I take things at his pace.
Aspen was rehomed to me at 16 as well and has been with me for about five years. He lived with a bachelor before coming to me and has the beak of a sailor and is the biggest chicken I have ever met in my life! He's a sweet bird but does not want to be held or touched and refuses to step up no matter what we try. Once again, I let him do as he pleases. He will come out of his cage on occasion but tends to head straight for our wood work. He also likes being talked to.
Smokey has been with us about two years now and is the only grey in the house who truly likes my husband. He doesn't like women but will tolerate me and is even nice to me when not by his cage. He is also the only grey we have at about 22 who doesn't talk. He loves to whistle and fart and burp though and keeps us laughing. He also loves to play with toys and also likes to journey around the house and bite me if I'm not paying attention. Loves my husband to bits of course.
The last two greys came to us as a pair. The male is 19 and his name is Seymour and he's completely obsessed with me and will follow me around the house like a puppy dog. The female is five and her name is Chevey and she is sweet and loving although she likes to push poor Seymour around when she wants to be fed or preened...she's not too pushy but we definitely know who's the boss in the relationship! She will step up for me or my hubby but Seymour absolutely hates my husband...he will go after him whenever he gets a chance!
So, out of all the greys, the ones who really need one on one attention from me are Tuchis and Seymour. They demand it! The others, not so much. Obviously, cleaning time, and toy making time, and feeding time for all my birds is going to be different because I have a lot. If it's only you, I would really consider getting two birds. All of my greys talk to each other and chat up a storm with the other birds in the house. They are all flock animals and like the company even if they don't physically interact with each other. I don't think you should rule out a grey because of your schedule, but be prepared to spend as much of your free time with the bird as possible and make sure that you have the money to offer up toys and stimulation when you aren't home. Music, the tv, and possibly another bird down the road. Those are my thoughts anyway.
I find greys, especially the CAGs, fairly easy going. It's also going to depend on whether you get an adult who needs a home who is established in his personality or a baby who is new and may change in personality as he grows. The older grey is going to pretty much be what you expect. The baby will change.