I've never had a BC but my mom has one and I am around them all the time at work and during classes and trials and such. I find them to be quite nice dogs when bred properly. At work, there is hardly a single male BC I like. I don't know what it is, but it's rare we don't get a male BC that isn't a complete freak. Most of the females are lovely dogs and do exactly what they are told. They aren't the greatest first-time agility dogs but then neither is a Belgian lol. Belgians are harder to control drive and impulse-wise, BCs are harder to control speed and movement-wise -- they don't arch their jumps, so they tend to knock bars. I must say, the only thing I couldn't handle about a well-bred BC is the fetch drive. Too much ball stick ball stick ball stick for me.