Awesome, thanks everyone!
From the little I've read recently, I believe females can be a bit more of a handful and are prone to being a bit hormonal- much like how birdhouse described Kura. I believe they can be prone to displaying nesting behaviours- so might try and hole up somewhere in the house if the mood strikes them.
I remember Reggie's feathers being totally different than Alfies. He was a bit of a mess when the store took him in- very messy feathers. But once he had settled, had his diet sorted and was getting socialized they neatened back up again and he was a gorgeous looking bird as well as super soft to touch. He was always really friendly (even though he hadn't spent much time with humans) and VERY curious. Always wanted to take a look (and a nibble) of whatever we had for lunch! I just hope he has a happy, healthy life with the family that took him.
The information from greywings was really interesting. Their colours makes a lot of sense when you talk about their roles.
I'll look out for the posts about Sully too.