I judge dogs on their personalities. When I was young, I had always heard that female dogs were a lot sweeter than males. Since I was so young when I heard this, I believed it for a long time. But now I have two boys and I couldn't be happier. I think the generalization is true in many cases but it is also possible to find a sweet, gentle male or a dominant, bratty female. I also heard male cats are friendlier than females but my female kitty is one of the exceptions to the rule.