atoo, Macaw, African Grey - Which Are More Demanding and Difficult to Keep?

ALL PARROTS are very sensitive and demanding. They can make marvelous pets, but the demands are very high. It does look as if You have done Your home work. I have two small parrots that take up all my leisure time. The Macaws and atoos would be out of my league,(and I am fairly experienced). So if You are a novice then the best choice out of the three would be the Grey. I would personally recommend something like a Senegal or a Jardines or Meyers though if it is the first bird You have kept. If it works well with one of these smaller birds then there is no reason why You could not get the larger bird later.