If you book a decent reviewed WG you should be able to communicate what you are looking for, especially at the start of the booking. This helps them as well, give you the service you want and make you hopefully a happy and returning client.
That's what makes a punt mechanical like for me. I want to go with the flow, and as in the post above, if she goes in for a kiss/ passionate kissing before you've even dealt with the paperwork, it's probably a good sign.
I don't want to be giving her the cash, off she goes to stash it, tells me to undress and lie on the bed, returns 15 mins later after she's very possibly lubed up, and then it's a case of telling her the plan for the day of "BJ, RO, doggy, me on top".
Kissing from the off, seeming interested, responsive, no fake moaning, no funny smells from down below, applying lube in front of you etc. is what works for me.
Yes there's the odd occasion where I just want a shag and not much else, but mostly I want to feel as if she's not going through the bare minimum of motions just to make me cum ASAP. Always said, if there's two of us, it's not just about me, and the physical and emotional contact is nice, hopefully for both parties.