Vocalization depends entirely on the personality of the individual bird. They also make decent talkers as they have clear articulation, but sound high and nasal when speaking. Macaws are curious and intelligent. They love puzzles, and will often unpuzzle themselves right out of a locked cage. Give them lots of chew toys.
Macaws love acrobatics and appreciate a swing or a rope to twirl on.
Things to climb on are dandy, too. It seems that most macaws like the TV as well. Many enjoy a bath. If you have the time and ambition, you can teach a macaw to eat with a spoon, and do other various tricks. You need the biggest cage you can get a hold of.