As she is a provider, and if I have booked her she is a darned good one; I don't really have to worry about whether or not she gives good BJs and stuff. Of course she does.
What is most important to me to make a session work is good conversation. I like a woman to be really bright -- and unafraid of offending me over a difference of opinion. And laughter, jokes, games, etc. are fine.
With the exception of one courtesan who can get me from zero to 60 quite quickly; most others need to give me a comfort level with them first. I simply do not arrive ready for sex. Intelligent conversation, preferably dealing with non-sexual topics, is a good way to get me comfortable.
The second most important thing is that she express herself as needed.
I once booked a lady for a dinner date. In advance, I asked her about her dietary preferences. Why did I ask? Well, because I care about that kind of stuff. Anyway, she told me she basically had no preferences. But later, through other conversation, I discovered she was actually adhering to a particular dietary regimen that excluded a lot of common things.
Yes, yes -- I realize that while "on the clock" it is arguably a provider's job to please me. But if she won't speak up about something so minor as a dietary preference; what else won't she speak up about?
If a lady expresses herself as needed; that makes my end of things a lot easier.