Any bird that you want to befriend will take a lot of work. I just know that a lot more people have been successful making pets out of chickens and parrots than have with quail.
Coturnix are probably the most domesticated of quail, but they are still quail. They are small prey animals, and will react as such. If you want a bird that you can really make friends with, I would suggest a parrot or a chicken. Even those you will need to spend a lot of time with and learn...