I have Border Collies- and honestly, I don't think I had a choice. My sister got our first BC, Shadow, when I was 5, and we've had BCs ever since. I've had other breeds- I had a Gordon Setter and I've fostered Papillons, Aussies, one Pit Bull x (honestly I have no idea what princess was LOL!), and its never even been a contest- Border Collies are my breed. Flat out, no way I could go to another breed, at least not without a few BCs in my house.
Why BCs, why not any other breed? I actually don't know. Its in their soul, its in their eyes. They are the most awful, manipulative, headache-inducing, wonderful, beautiful and brilliant dogs in the world. That's all I can say