Pet Size

Im looking to get a pet bird. I want something very sweet and kind any size is ok.?
I know nothing about what types birds are good pets, I was thinking a parakeet, parrot or parrot of some kind. Any ideas?! Ive grown up with parakeets and Cannarias. But they are small and boring! I love birds vowels and was looking at something bigger than you like a lot of attention.
I guess I go for a hand-raised cockatoo. They are friendly and loving, love to be with their owners as much as possible but are not so needy that they resort to feather plucking if not receiving enough attention. than are able to speak (males in particular) and whistling songs collected quickly. also their average life expectancy is 15-20 years, so they do not have the commitment lifetime that you get with some of the larger parrots (within lifetime commitment of course is what you want)
World of warcraft exploit: Pet size