I have a combo of all three, smart and lazy Gage, you can train him to do anything, but he isn't going to run around house. He can go to the dog park, but he really just wants people to pet him, lol.
Lazy and well maybe not stupid but not biddable Bristol, she isn't going to destroy anything, she will dig in a small garbage can, IF its got food in it and is easy to, but pretty much anything will stop her, including being asleep and not noticing I have left. And walks and dog park, ya she just doesn't do them, lol.
Then we have Diesel, who, I think, is what people want in sport dogs, he is athletically built to be fast, he has springs in his legs I think, he is biddable, and a breeze to train, but he out thinks me and we have to work on controlling him because he wants to go through all the equipment lol.
Most people who have met them are drawn to Gage and Bristol. I find older people want a Bristol,younger couples with older kids want Gage....the only people who want Diesel are his trainers lol.
Unfortunately most people shop with their eyes only and buy the cutest fluffiest puppy they see, they don't often even read about the dog they bought until they get it home. The few that do research google "best family dog" and search out what ever it says is the best.