Sex aside, it seems you should go with the one you connected with and vice-versa!! We got our first yorkie almost 2 years ago - a boy. He's feisty (uh, sometimes obnoxiously so), super sweet, smart, loyal and loving. ADORE him. Love him so much when we went looking for yorkie #2, we had our hearts set on another boy. We found another loving, even more sweet little rescue guy. My family is SO happy we have boys, our experience with them has been great.