Always had border collies and have passed on the love if not obsession for the breed to ours.
They are the most underestimated and misunderstood of all the breeds I think. Assumed to be easy to own and manage because they are so intelligent and easy to train.
It is true they are so intelligent and yes easy to train for the basic but that sharp mind watches, listens, sees and learns everything we do, even what we don't know we do - they know and will pick up and learn from it for better or worse 
youtu.be/q8FfNQ_E0l0