I'm sad to read such a generalization of female yorkies. All yorkies can be sooo different, one from another, some are friendly, playful, obedient, some are not, whether male or female.
I have a girl and boy and the girl instigates play more than Zander, she is very loveable, loves to be on laps, loves people. Zander is a bit more cautious but very sweet.
Jazzie was a snap to potty train as well.
Wish you the best with your choice.