Timneh Greys are nervous, shy, high-strung birds and don't make good pets. Scarlet Macaws are vicious and prone to biting. Cockatoos can't learn to talk.
Fig parrots are fragile, prone to stress death, and extremely difficult to keep.
Quaker parakeets are extremely noisy and quite mean. That's right, wild-caught, imported birds out of quarantine stations. Stop and think how few years ago it was that most parrots available to the public WERE wild caught imports.