Hello Mistress Ahn,
I agree with most of the men here, that there must be a certain level of physical attraction when choosing a Mistress (or in my case, a Ballbuster). For me, that means she must be fairly young, fit, and Asian. I also look closely at the pictures of her, and really go for the ladies that look good (innocent?) in street clothes. I love taking Ballbusters out to lunch/dinner, and seeing if they can find ways to sneak in extra Ballshots!! So, I am definitely drawn to that sweet smile.
Also, I think it is important to consider what makes a guy go BACK to a Mistress (Ballbuster). For me, there must be an emotional connection made. I can tell if the woman loves to bust balls, or if she's just waiting for the envelope at the end of the hour. One of the best Ballbusters I ever met absolutely lit up when she started the ballkicking. She was so enthusiastic, that she would always push me past my pain threshold, but when I looked into her eyes, I just had to spread my legs and let her have a few more kicks. Another young lady I know will walk into the room wearing thigh high leather boots, short shorts, and a tight T-shirt. She will look at my hard-on, raise an eye brow, then WHAM!! A full force kick in the balls! She would also make me do things that I had not even considered doing before: I now LOVE it when she puts her tiny feet in my face, or makes me do certain other things for her...with that emotional connection, she was able to read me, and had no problem making me do any thing she wanted me to.
Finally, the Ballbuster must demonstrate a basic level of competence. I met with one Ballbuster that was SMOKING hot, and extremely enthusiastic, but she ended up bruising me from my knees to my hips. I dont expect martial arts training, but they should be able to kick a guy fairly accurately in the nuts.
So, Mistress Ahn, even though I look for a Ballbuster, and not necessarily a "Mistress", I think the qualities are the same. If you can make that emotional connection with a man, and get inside his head, and LOVE to do what he loves for you to do...he will keep coming back!