ok my list:
1. body: this comes first, when she walk in the room does my jaw want to hit the floor? preferably a natural body, but if it's a good job surgery is ok.
2. personality: basically do I want to spend time with her (even if it is a half hour while she's massaging me), am I interested in what she's saying or do I want to run out of the room after she's done.
3. articulate: kind of goes with personality, but this is important on it's own. Can I understand what she's saying? she has to speak well or even if she has a great personality I wont be able to tell.
4. sexy. beyond the body, is she being erotic during the massage? Does she seem like she's enjoying herself? is she into what she's doing or is she just trying to get you off? It's an attitude thing that makes all the difference.
5. sense of humour: lets face it, going in getting naked for someone you've just met and paying for a BS is an odd thing to do and can be awkward (I felt very awkward my first time), can she relax you and lighten things up without ruining the moment. If it's a yes then I'm there.
6. clothing: this is minor, but I like it if the MPA is dressed very sexy, and connected to this, I'd like it if she made the stripping a bit of a show, or let me help take her clothes off (I havent had this happen, but it would be nice)
I think thats all for now.