Attached is a picture of my Umbrella cockatoo dancing and singing. Her joy is evidenced about twice daily in my home. Cockatoos are not obedient. Cockatoos are manipulative. They love to contemplate the best way to get you to let them do what they want to do.
Cockatoos can be unpredictable in temperament.
They can be contemplative one minute and screaming in fun the next. Their moods can change rapidly. Cockatoos are thought destructive because they are prolific chewers. Cockatoos may be more destructive chewers than many other parrots. They constantly need new supplies of wood to shred and gnaw.