jen, that is a weird desire - wanting to own a turkey vulture if you could have any bird in the world! But I can see that since you've actually had experience with them & have found them to be endearing & smart, then it would be pretty cool for you to have one! You'd probably be the only one who could boast of having a pet turkey vulture too!
Victor, cockatoos are definitely cool and highly entertaining. They're probably the most needy bird I can think of, craving attention & interaction constantly. That's why so many are known to develop emotional & psychological problems, feather plucking & such, because if they don't get enough attention, it drives them crazy! We'd considered getting a cockatoo before we ended up buying our Eclectus. The neediness of such a high energy bird is what put me off, but they're definitely one of the coolest parrots on earth!
Ram, if you had the room for all 3 birds, you could definitely have them all at the same time. You'd just have to be sure your eagle wouldn't eat your talking parrot. We have a gourmet market just down the road from us. They have exotic birds & animals outside in a cool pen, with many peacocks strutting around; a big pond with beautiful swans & ducks; and an indoor aviary in their huge greenhouse with lots of parrots. It's a fun place to go visit. But they don't have an eagle!
Hummingbirds are so beautiful & fascinating to watch, mora! A girlfriend of mine is living in Mexico as a missionary and she has posted fantastic photos of hummingbirds that have a tiny nest in her yard. She's gotten some shots that should be in national magazines! They're a very hard bird to capture in photographs!