I've been struggling between the two.  
When I'm booked, I assume he wants the woman he sees in the photo, pin up, glamour model.  
Yet, on numerous occasions, I've been asked to come natural face/hair and jeans.  

I think its an "individual" thing.  

I'm a nature boy at heart, and see the whole makeup thing as a bit contrived, though I know a few gals really get off on putting on their "war paint", so to speak.  One gal told me that it makes her feel sexy.  If that be the case, than so be it.

I always do and they give me "whatever you prefer" so I go with glamour. But when they see a photo on social media of  me natural, they act like i robbed them or something and say i want this girl next time.

However the problem is when men say makeup free, only very few actually mean it (or know what it means). Like they'll point at girl they think is not wearing makeup, but she's wearing foundation, concealer, light mascara, shaded eyebrows and a nude lipstick. It really varies.  

I for glamour. Appreciate the effort.

Ha, guys that know too much about makeup are probably only visiting the TS forum. (I kid.)

That there are men naive enough or just fell off a turnip truck yesterday they never heard of "photoshop" or "re-touching" by professional photographers.  

a provider to see, its all about the fantasy.  If I want reality, I'll ask a civvie girl from the gym to go out.  It okay for gym girls to work up a sweat.

In my opinion I usually like a girl that looks stunning without having seemed to have made the effort. We've all seen the before/after make up shots of All the celebs out there and a fair few look just as good before as after but the same number need a little help to get that perfect complexion. Same goes in real life.  

Opinions will vary greatly on this one. Great question nonetheless. I prefer natural and tend to shy away from providers that post glamour shots. I have a certain biased when it comes to those types. Most guys just want an around the way girl not some pin up model. Many hobbyist do not place so much stock in a providers look but the service. Service is sustainable, looks are not. My regular providers are the one that provide the most sustainable service and they all are not glamour in looks.

I've had guys request I come casual, totally natural no makeup... So I do my makeup as usual and they are thrilled.

I have actually had that happen to me before as clinets do like the all glam'd up look and want the all natural girl. I guess all people are different and want to see you in your comfy jeans, and not so much make-up look. Then they get to see the real you and not all the made up extra stuff added to the original women. I guess just their preferences.

I prefer the glamour look at least the first time I see a provider.  Especially if that is how her photos are.  A couple of all time favorites I am comfortable with the more casual/natural look.