I have six corturnix quail in one aviary and 2 like being touched and picked up. The rest is pretty shy and will only eat from my hand. In my other aviary, nobody of the seven enjoys being handled. They don't mind me hanging around them but don't want to be touched. I have spend much time with all of them when they were chicks and still do. But I think it depends on the character, some are more docile than others. I don't think you can get every quail to enjoy being picked up, but if you have a few who are docile, great. Show these around and leave the rest alone or let people only hand feed them.