In most ways, yes, but they've all changed a bit as well.
Dance was a super skittish puppy. The only puppy I've ever had who would totally put the brakes on and refuse to walk a further step if there were strangers nearby or anything else she thought was weird. She was also super biddable and just a huge mom suck. Now, as a mature adult, she's much more comfortable with environments overall, but still a weirdo with most people, and she's become very independent as she's gotten older. Everything is all about her now and she constantly questions me. She works for food and play. Not for me haha. She likes to do her own thing, on her own terms. She's also increasingly bitchy and snarky with other dogs and has become a bit of a control freak Fun Police, whereas she used to be quite playful. But that seems pretty common in mature dogs. WHen it comes down to it though, her inherent temperament is still there. She's just braver due to exposure and training, but her naturally skittish, jumpy temperament is always just under the surface.
Keira was a nightmare youngster. She was the only dog I've ever had that I thought I hated. I truly thought I'd never like her. She was super independent, distracted, not motivated by much, had separation anxiety, was a screamer, ran here there and everywhere without thought... just super annoying, no matter what. She's still kind of like that. She's overstimulated easily and I have to be careful to ensure that I don't let her get away with not thinking, but she's actually quite endearing and more level headed than she was. She's super sweet, kind, gentle and she has grown to love learning. She's not the best at it, but I am really enjoying her. We've come to terms with one another over the last couple of years and have actually formed a relationship lol. It took a long time, but there are many things I love about her now. I guess if I really think about though, yes, her base temperament is the same. Just a lot of time and energy has gone into making her livable haha.
Ripley is totally different than when he was young. Just completely. He was such a derpy, happy go lucky, people pleasing, super friendly youngster. I thought he'd grow up to be a bombproof dog. Instead, he's gotten increasingly insecure, thinks he should alert me to things he deems strange (someone walking in our field, wearing weird clothes), and is not reliably dog friendly any longer. Some of these I think are just mature Doberman things, but other things I find a little weird. He should be a lot more brave and confident than he is, and he has no reason to be a little off wish some people now, when he was totally fine in the past. Even at home he's more insecure and worries, and I can't think of anything to have caused it. But he's still a sweet, dopey boy just like he used to be. Just not quite the dog I expected him to turn into at all. It makes me sad, because I know I did everything in my power to mold him into a confident, take anywhere dog. I feel like maybe his thyroid is affecting his temperament, because these changes occurred after 3 years old, but blood panels don't show anything.
Journey is only a year old but she's basically the same as when I brought her home. Super happy, playful, easily motivated. If anything she's even more outgoing than when she was younger. But I don't consider a 12 month old dog to be an adult, so we'll see what happens in the next year or two. I hope she stays this wonderful forever.