How are they alike/different? I'm thinking about one as my next dog (not for a few years yet) and am interested in the differences in their personalities. I've met a few BC's, and many of the trainers in my obedience club have Aussies, so I'm getting to know Aussies fairly well. From my experience it seems that BCs are more intense and serious, and Aussies have more of a sense of humor, if that makes sense. But the Aussies I've met seem a bit harder than BC's - more like ACD's in a way. What do you think? How do they compare on drive, bidability, quirkiness? With my next dog I want to do obedience and tracking, maybe agility (I'm gonna need a lot more free time LOL).