I have a male yorkie and a female maltese, and they are both wonderful. My boy was potty trained very quickly. We had him neutered at about 1yr and we don't have any problems at all with humping or marking. My yorkie is super lovable and cuddly!! He wants to be with me or my husband all the time
Our female is also lovable and cuddly! and wants to be with us always!
I think it totally depends on the specific dog's personality, not the sex of the dog
Let the pup choose you