Curious about the best intro text when reaching out for the first time.....

an appointment request, you will get a quicker response, in my experience.  I include a day and time that I want to see her and tell her if she's not available at that time, I do have some flexibility if she wants to propose something else.  This shows I'm serious and not going to waste her time.  Then I leave my first name, my hobby phone number, and two ref's that I know will respond to her quickly.  Then I shut up and give her time to answer.  

Get the business part out of the way and get booked first - then maybe the personal intro if she desires it.

If you’re not asking for a specific appointment in your intro message, you’re throwing up a red flag. As advised above, first contact should include your appointment request.

I don't feel any need at all to make my first contact with a provider I am interested in an "appointment request" I am the BUYER, not the seller and if the lady in question leaps to the conclusion that I am a time waster just because my first contact with her is not to book a session, but might be me asking her a relevant question about booking a session and not an actual appointment request than she and I probably aren't going to be a good fit anyhow.

To the person who started this thread, Gagambler is an example of how NOT to make first contact. Rude, crude and entitled is no way to make an impression to a lady.

First, read her ad(s) and see if there are any specifics on what she wants in a booking request. Then do that.  

He takes great pride in self-identifying as an asshole. But he's actually a primitive asshole, a/k/a a Cloaca. From MedidineNet:

All you spineless suckups who are terrified of coming across as timewasters, even if you have a legitimate question you'd like to ask the lady BEFORE booking with her are the ones who are constantly whining about not getting your messages returned, while an admitted asshole like me doesn't have any of these same problems.  

Or not having a pair, its about getting jaded providers who have had past issues with time wasters giving you a quick response.  Once she knows you're not going to be playing footsy for three or four  days  of chatting, she will have a much better attitude and look forward to seeing you.  There are two kinds of customers, those that providers WANT to spend time with, and those they HAVE to spend time with because the rent is due next week.  Guess which kind of session is better?

Quite the contrary, I want to screen OUT the old, tired, jaded providers who DEMAND their clients follow their directions to the letter.

You are speaking only for yourself.  I was trying to give advice that would help the OP, not discourage him when he doesn't get the same results that you do.  We are not all as charming with the ladies as you are, and I have learned from MY own experience that there are MANY indies that have a continuing problem with time-wasters.  I'm just saying that leading with an appointment removes you from the category of the lonely guys who just want someone to chat with, then if they fall in love, they will make an appointment.  If you don't think the ladies get guys like this, ask around.   If this doesn't work for you, then by all means, do it the way that does.  The beauty of this biz is that there are many ways to approach it, but the same say doesn't work for everyone.  

This all reminds me of the book by Joe Carbo about direct mail sales.  He told about a guy who ran a direct sales operation who would open letters, and if they didn't have money in them, throw the letters away.
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He couldn't believe the guy was throwing away these sales opportunities.  The cost of finding customers is not zero.  Yet when a potential customer approached, this guy would throw away these leads ... throwing away potential riches.
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Lots of escorts make the same mistake.  They call those contacts "time wasters."   No doubt some are, but also no doubt they are throwing away thousands of dollars of potential because they fail to realize the cost of finding the next batch of customers is not zero.

Not all gents who initially reach out a specific day/time and length of appt.
Some gents might want to know the general area of where I will be or a clarification on arrival/departure days of my visit to a specific city.
I would suggest also mentioning in your into a day/time and length of appt you are interested in.
That way a lady is not taking time to screen you for a date/time that might not work for you or her.
Just my .02

a "tipping point" where it becomes a diminishing return.  Once a guy has identified himself as high-maintenance, that is not likely to stop after she sees him the first time.  Its a question of how much OTC time can you give a needy, lonely guy and still make money off of him.  

That new guys should lead with an appointment request or something close to it.  I agree.  That's the way I do it, too.

Quick summary of GaG’s principle. Mongers are the buyers, they don’t need to submit an appointment request on first contact.

I often reach out to providers without making an appointment request and rarely do I fail to get a response, that said I can't ever remember opening communications with a provider in as vague a manner as your example suggests.  

Of course one has to have some rational metric.  But these girls are charging $300+ hour.  Their downtime is an opportunity cost.  They are making zero dollars whether they are answering a query or watching afternoon soaps.  Answering the query has future income potential ... watching the soaps, not so much.

a provider that she should spend her leisure time chatting with some lonely guy who can't seem to pull the trigger on booking an appointment without a lot of hand-holding.  Your point about "future income potential" is in the abstract.  Yes, I could have "future income potential" if I spend Sunday afternoon calling clients instead of watching the Superbowl, but like I said, there is a tipping point for everyone on how much THEY WANT TO SPECULATE with their time in order to attract difficult clients that are likely to remain difficult in the future.  Only the most desperate go after high-maintenance customers, regardless of the industry.