I've raised and worked with both male and females, though i haven't owned one personally. The males are more... affectionate? The females are just more moody and demanding, in my experience, whereas the males are more mellow and even tempered. As far as noise, they can certainly be loud when they want to but most of them I've worked with, either raising or grooming for clients, are usually pretty quiet. They're mediocre talkers, not super snuggly, but can be very affectionate in their own way.
Ekkies are prone to plucking, their diet is really particular, and they are prone to other feather and beak related problems due to diet. We had a client with a male Solomon ekkie whom had an overgrown beak from his first owner, and for over a year with her. She spent almost $1,000 on diagnostics, because it was needing trimmed every 2-3 weeks, growing almost 1 inch
in that time! One day, she did some research, and took peanuts out of his diet - she was giving him 3-4 a day as a reward to tame him and bond, switched to almonds. Within 2 months, his beak was no longer overgrowing! Our vet, who is a VERY well known and knowledgeable vet, had no explanation other than we have no real idea or set good diet for ekkies in captivity, so for almost every one she knows it's all touch and go!
Not to scare you off - that was the first and only case I've ever seen that was so extreme. Mostly, with diet, it affects feather quality (gloss, shine, conformity) and can cause plucking, slight overgrowth or even undergrowth and thinness of beak and nails. I know colored pellets can cause a condition in ekkies that causes them to clench their feet and "rap" them, almost like palsy?
But they are really very gentle, mellow, sweet birds. People are right, they can be low key and sensitive to their environment, so if you plan on having kids and a loud household, then it may be best to wait until you HAVE kids and hustle and bustle so when you bring a baby home s/he is used to it off the bat.
As far as male vs female, I personally have found the females to be bratty and bossy. In the wild, females live in a tree with a harem of males feeding her, caring for her, and mating with her. So they're fairly genetically programmed to being spoiled and pampered, whereas males are more instinctively affectionate. Parrots aren't tame, so wild drives and instincts are still strong in them. The adult females I've seen are less prone to plucking, but more prone to screaming.
I don't know how all this relates to experiences others have had with owning an ekkie for long term, but this is all the feedback I've gotten from clients and experience with birds I've raised and birds I've groomed and worked with their owner's on taming, diet, etc at the pet shop. We sold one male ekkie at the shop in west palm to a family with 4 children, ages 12-5, who went to everyone, showered with Daddy, and was very mellow but did NOT want to be pet at all, even well hand raised and socialized. He went to them at about 6 months, I quit there when he was about a year old.
I hope all that helps, sorry for rambling a bit and the wall o text!