I have always thought macaws were beautiful. I had my mind made up to buy a greenwing, but I ended up rescuing a B&G (~20 years old). I've only had her for a few weeks, but she is adjusting well.
I believe Alwese is right about them being one man birds. My Lucky is not ok with anyone but me petting her. Thankfully, though she will step up for my wife and allow her to take her from perch to cage, etc., so she is not an agressive bird--there's a difference.
On another note, I have a problem with the economics of buying these long lived birds. I think the government should require a permit or something that drives up the cost a few thousand dollars. Many times you can purchase these birds for less than $2,000 and people can readily get instant credit in stores or on their credit cards. Also, as Alwese says, these are not dogs that live to be, at best 15, these birds will probably outlive you AND macaws (et al large parrots) require a lot more specialized care than a dog.