There's only room for one Queen in this castle
All kidding aside, I have owned both male and female dogs. As mentioned by another poster, males are eager to please and content to play follow the leader all day. Not to say the females I trained didn't try, they are just more mellow. Males = life is one big game... Females = Ah, what's the hurry
I can definitely see the appeal to owning a female, potty training is also less stressful. However, for my personality and lifestyle, males suit my family better at the moment. Only time will tell if I may eventually want/prefer another female. I have a brother-in-law that for years had champion labs, agility/hunting studs. When the time came for a calm/mellow family dog (they have two daughters) he opted for a female, and this female has been perfect. The female getting up there in age and his daughters getting older (high school) he contemplates retiring in 5 years and having "time" for another male. That's just one example of male to female preference.