Off leash:
Keira mostly ignores other dogs. As she does with most things in life. She has zero interest in playing 98% of the time, but every once in a while she'll find a male dog that she thinks is just the best ever... and then embarrasses me by doing her stupid flirty screech at the dog haha. It's quite a site: play bowing, ears back, tail twitching, and some cute spinny circles like a little puppy, but then she has to go and shock everyone with that awful screech. Her sisters do it too; must be a family trait. But other than that, she just blows other dogs off and carries on her way like they're invisible. She's indifferent. And she'll tell rude dogs off with a quick growl, some hackles and carry on her way. She definitely prefers male dogs if she has to interact or wants to. Sometimes she can be a bit of a Fun Police type and try to break up play (but stops when we tell her) and sometimes (at her breeder's house only) she will loom over puppies or more submissive young adult females and growl at them (we tell her to knock it off of course - it's uncalled for) like older girls used to do to her (and sometimes still do).
Ripley doesn't care very much about other dogs anymore. Sometimes he'll initiate play with young dogs (of either sex), pointing breeds (Vizslas are his favourite), or certain happy-go-lucky and well mannered and playful types. He likes to greet other dogs with a quick sniff and then he carries on his way, much like Keira. He's perfectly fine with male or female dogs. There have been a few dogs who have made him posture uncomfortably, but it very rarely happens and it's an insecurity thing with just those particular temperaments. He calls off of them quickly and I've never had an issue. He was attacked unprovoked a few times when he was young and I'm pretty certain that's why his insecurities pop up (walking past a park on leash and other dogs came flying out of the park at him), because prior to the last two attacks, he was very confident and happy to meet new dogs. And after the last two, he started being more cautious and unsure and would sometimes run and scream from dogs who just looked at him a certain way or tried to play. He's over that now and it's nothing detrimental, but it definitely changed how he first approaches/interacts with new dogs.
Dance thinks other dogs are obnoxious and beneath her. She's quick to tell other dogs off appropriately when they're being rude or invading her space and she has zero interest in playing with 99.9% of other dogs. Little dogs annoy her and she dislikes dominant personalities. Some large dogs make her tuck her tail low and she can be a little insecure. Not sure what it is about those dogs. She loves big black male dogs. No idea why. She flirts with those. Or just huge male dogs in general actually. She's really not a social dog. She basically likes her people and her dogs, and everyone else she'd rather didn't exist. But she's appropriate and tolerant of other dogs and mainly ignores them unless they invade her space or are one of the few dogs she wants to go sniff over.
Journey is still a puppy and loves everyone. She's very respectful of other dogs though and listens if they tell her not to do something (like lick their mouths) and she's very aware of body language and what it means for the most part as well. She's very polite for a puppy, but living with Dance and Keira, she learned quickly what you can and cannot do with other dogs. She still has her moments of course, but all in all she's very happy and friendly and appropriate with other dogs.
With the exception of Journey at the moment, the only type of dog across the board that none of my adults like are the really in your face, "must play now!" types. They can't stand many terriers for that reason and avoid them.
On leash:
Ripley can be mildly reactive. He's unsure and insecure of dogs approaching on leash and gets frustrated. He raises his hackles, whines and growls. Not always, though. Often he'll be perfectly fine. I find usually he reacts when he hasn't expelled enough energy or is in an enclosed and overwhelming space (vet clinic). Oddly, if another dog reacts to him, he doesn't react back at all and trots on by like nothing ever happened.
Keira, again, acts like dogs don't exist. She doesn't even blink an eye at them.
Dance can be unsure sometimes and raise her tail/posture a bit, but that's all. She walks right by them without saying a word and breaks her focus from them. And sometmes she doesn't acknowledge them at all. Depends on what kind of mood she's in that day. Some days she's very insecure and weird, and other days she's happy and upbeat without a care in the world.
Journey's learning you can't play with every dog you see. She watches and wiggles at them but pays attention to what we're doing and walks past.