I love my boy!!! Beau has been fully housebroken since he was around 18 weeks old (I got him at 12). My only thing I would suggest if you get a boy, get him neutured ASAP! I didn't neuture Roscoe (my mix breed) early enough and he started marking, but Beau got neutured early enough that he didn't know enough to start marking...in fact he still squats. He he he.
The next yorkie I get is going to be a girl, for a couple of reasons. I really REALLY want to put dresses on her, I would LOVE to have a litter of my own babies, and I've never owned a girl before. Other than that though, I LOVE my boy!!!!