So I know it has been said, but I think it bears repeating that most people confuse the term drive with term energy. So someone may say they are looking for a "lower drive" dog, but what they mean is a lower energy dog.
I have seen plenty of dogs, evaluated plenty of dog that were said be VERY HIGH DRIVE, but they weren't, they were high energy. Always on the go, but with no purpose to their energy.
I also think the word drive has somehow morphed into meaning high 'prey/play" drive. And that becomes an issue as well. GSD should have and utilize multiple types of drive, prey/play, hunt,pack, defense. A dog can have a high prey drive, but very low hunt drive. So I think that we have a done s disservice by focusing so much on the "my dog will play ball all day long, he will jump off roofs to get his ball" But that same dog wont look for more than 5 second to find a ball that went into the brush.
In the SAR world, I typically look for a dog with a medium prey/play. A dog that really enjoys the toy and will do things to get that reward. But a deal breaker is a dog that wont look for that toy tirelessly. We have "tests" for SAR dogs. Throw the toy into heavy brush, hold the dog back for 30-60 second, turns them a around a few times, and then let them go. A dog will be washed if they dont go out and bust through brush and search and search for that toy.
So I think we need to look at how we use the word to describe what we are looking for.
My boy now is an overall medium drive dog. medium prey, medium hunt, good pack, medium energy. He like to play and tug, he will search for a pretty good time for his toy, he revels in praise when working and is fairly low energy. All in all an easy dog to live with. He will bring me toys at innopportune times and push to play, he will fetch for a while, he enjoys being challenged and loves to nap on the couch. None of his drives are at a level that would make him a good SAR dog. But he is a great dog that is enjoying other forms of work.
If he is a 6 in drive, I would like an 8 for SAR work. That said, people stop and watch us doing obedience and Rally. He is fun to watch work, because when he is on, he is ON. He is a dork a lot of the time, be he commands attention.
So to be honest and f using the words as I think thye should be used, a low drive would be pretty boring, they would have no desire to play, they would not want to work for their owner for anything. But that does not mean they would not be a busy dog.