I would advise you if you are interested in a Macaw or other large birds to visit a rescue in your area that house Macaws or other Parrots to see first hand as to what they are like. Each Parrot is so very different from others. Nothing is ever the norm when it comes to Parrots.
The Members here can only tell their stories based off of their own Macaws.
There are some Macaws that are more vocal then others but this is not always the case.
If you do your homework, learn as much as possible about these amazing birds, I'm sure when it is time for you to own one, you will make the right choice.
I own a 6 year old Male Eclectus (Guapo) and a 5 year old Green Wing Macaw(Neleno). I live in a Condo and have worked very hard on what levels are noise is allowed. Yes, there are times when they may get over excited and scream but it is never for long periods of time, it is mostly 1 scream, then they make eye contact with me as if to say, My Bad****
I use hand signals with my birds and words that they both know as commands when an action is not wanted. This has taken me years to teach them.
Noise is a big factor when thinking about bringing a Macaw into the home. If you read the Books about Macaws, most will say that the Green Wing is more quiet then others. My Neleno would rather talk then scream. This is also true for my Eclectus.
The better question is, can you make the time for them. They are not like dogs and cats that can be left alone for hours on end.
They only thrive when interacting with you. They demand your attn. If not given, this is when behavior issues come into play.
They too can start feather plucking or harming themselves in other ways and will do anything to get your attn.
Finances are another issue. Macaws are not cheap. Food, Toys, and vet visits can be really expensive. Sure there are ways to lower the cost on toys by making them yourselve. I used to do this but as time went by, I found myself just going out and purchasing them to save time.
I also found that King cages are your best bet when it comes to housing a Macaw. Please stay away from cages from asian countries. Most are not made with bird safe materials.
Also stay away from asian bird toys.
If a Macaw is in your future, you cannot make a better choice, they are amazing creatures, they form very strong bonds with their owners (flock members) they are very loyal to you. They really go out of their way to please the one they love.
Until you are hugged by a Macaw, you have not lived. My Neleno will stretch out his wings, specially after bath time, lay his head onto my chest and wrap his wings around me. I have a picture on my desk at work and most people that know nothing about Parrots or Macaws cannot believe their eyes when they see it. The first thing they say is, Is that real or photo shopped. I have to learn how to attach the photo with this site. So cool.
Best of luck to you. Joe