I hope the original poster of this comment doesn't mind my taking this and using it as a spinoff thread. I thought this would make a great discussion.
IMO there is no reason to get a working line of ANY BREED if its just
going to be a pet that goes on hikes or romps in the woods...
And in fact for the most part I believe the opposite. I have to clarify two points however:
By working line or working bred, I mean literally bred for a specific function which is vital to the owner/handler - herding dogs which work livestock on farms, terriers bred to the working standard, protection dogs which have advanced titles and produce real working dogs, hunting dogs which really bring in the bacon - um, game.
Second, I don't consider any working breeder truly committed to producing real working dogs, if they ignore health issues. The soundness of true working dogs has to be a given, otherwise what's the point? Soundness must include mental soundness, as well.
Although working dogs have to have plenty of drive, they also have to be balanced. Balance means they don't have runaway instincts (the exception might be lines of working dogs that are bred to be worked on the shock collar), that there's also an ability to be trained to restrain their inclination to react instinctively, bounce off the walls for the fun of it, or mentally spin out of control. Patience is very important to a working dog. A dog that frets itself into a lather when not required to work will be "done" before it's even out of the box. That's useless.
I once was at my trainer's when a really heavy duty, young Malinois that was training for Sch arrived with his handler for their first time on sheep. He was so laid back that I thought, "Wow, this dog must be back yard bred or mixed with something." Nope, the line is selected heavily for coolness and steadiness of character (sorry, I have NO idea of the terms in Sch-speak).
And, when he got into the pen and realized he was being encouraged to let his prey drive take over - Katie bar the door! Yikes! His handler had to get in there and OUT, OUT, OUT because he had my sheep's head and was bearing her down to the ground! But once he realized the rules, again, he is far and away the best Belgian I ever have personally seen on stock (and by the way, he didn't leave a scratch on the ewe - he used exactly as much pressure as needed to hold her in place). That same balance made him tremendously adaptable and versatile - exactly what the "sporty" breeders claim for their dogs, which are actually usually over the top and out of control.
What strikes me about working dogs, assuming they are properly raised, is that they tend to be centered and confident, and know their place. It's instinctive in them to SEEK a place (yes, even terriers!) and a job - that horrifying thing that people whisper, "Oh, don't get a working bred dog, if they don't have a JOB they will eat your house!"
Yes, that is true. What it fails to mention is that a "job" can be to 99% of working bred dogs, is being a part of your life. Working bred dogs crave most of all structure and a routine. More independent breeds of dog need activities that are intrinsically rewarding - ball playing, clicker training, etc. More biddable dogs can be happy with anything that seems "joblike" - going on car rides on a predictable schedule, touring the neighborhood and checking for evildoers, picking up all their toys, picking up the kids laundry they left on the bathroom floor, the list is literally infinite.
The key is letting the dog know that their #1 job is to follow you around. If I sit, they stay in the room. I don't care what they do - they can sleep or stand on their heads as long as they don't get into trouble or go out of sight. If they start to leave, they get a little "eh-eh" reminder to stick around. If I leave, they come with. If they don't follow, they get a little reminder again. The dogs love this once they figure out the game - they feel incredibly important ("She needs me! She loves me!";).
And if they are in the room with you, they are not eating the couch. 