We've had a couple of Bouviers, and have always liked Briards.
Here's a couple of photos of the hairy beasts.
Tess, the one laying on the deck seat, was a super-intelligent dog, and very protective and discerning. Two incidents come to mind. A contractor had been here to measure for new windows, Tess had been introduced and everything was cool. However, a few minutes after he left, he decided he needed to come back and measure one more thing, so he let himself into the back yard unannounced. Next things we hear a big ruckus, and Tess was doing a very credible "bark and hold" on the guy, he was backed up against the house in a corner with his clipboard covering his -er - "privates".
In another case my wife answered the door for the UPS driver to sign for something, told him to wait while she got Tess settled, but the fool opened the door and advanced into the house. Tess knocked my wife aside and nailed the guy in the stomach, full bite. He starts yelling about how he has to report that, and my wife just tells him he's stupid for opening the door and entering without being asked. We never heard anything more about it.
The other Bouvier, Nikki, was just a big lover, but looked massive with all the hair. She was a natural herder, but not too many sheep to take care of in the city, so her job ended up being a therapy dog, doing nursing home and hospital visits.
We miss them both.