I have kept many species of quails over the years.
I can advise AGAINST the button quails AKA Chinese Painted Quail.
They are very cute and beautiful, but they can be very mean and aggressive with each other. They also are mostly very wild acting and not easy to tame at all.
Here is my story / experience with them:
I had them turn on each other one moment, where they had been fine for months together. They were in a huge garden planted natural aviary... with lots of grasses, logs, rocks and hiding places... and lots of space. They lived together with various finches, diamond doves and a canary.
There were no warning signs. Once one male started to fight / scalp the others I had to separate him. But then the others started to fight each other the next day so I had to separate them into pairs.
But after a few weeks of peace the males attacked the females and pulled out all the feathers on their backs and made them bleed. A few males scalped their mates too. So I had to keep the males separate.
That was a nightmare because then the males started to scream and crow... which sounds really spooky like a ghost... constantly day and night. It was so annoying... and my neighbours even came around and complained about the noise.
The females that were now in a group on their own started to peck each others eyes and faces and make them bleed...
so in the end they were all in separate cages (9 in total) and were being really noisy and no fun to take care of a lot of noisy injured quails.
They were healing up great, but them started to fight between the cage mesh dividers... again killing another one and scalping more.
I double wired the cages and I waited till they healed up (some had no skin on their heads but healed up great with treatment) and then sold the lot!!!
I will never keep them again for sure!
I really recommend the Japanese Quails.
They come in many different colours, from chocolate, wild colour, light, blond, and white.
They are really placid and naturally tame.
They are calm and quiet and lay lots of big eggs you can eat.
They are funny to watch... dust bathing, snuggling together, sunbathing stretched out, running about and practicing flapping their wings. They will come running to you for treats and can be petted easily (although they are not a bird that likes being held).
I have never had aggression problem with this species, even the males are friendly. At the moment I have 2 males and 8 females.