I always prefer bitches - but this is my very personal preference. I like to cuddle, treat and spoil my girls, they are allowed to be naughty, to be princesses and so on. Whereas boys to me are somewhat like men - they are the stronger sex, they should take care of us girls spoil and cuddle us, they should always be calm, kind, patient, no nonsense. Weird but that's how I feel!

So I guess it depends why you get the dog, if its your personal companion then you think what would you like. But if it is for the family with children, then I think either would be fine or perhaps a dog may indeed be preferable as they do tend to be more composed and calm and listen to their owners whereas girls are more likely to have that little bit of their own mind.