Years ago in Chicago I met a provider who would fit into that category.  No make up, nothing beyond the granola type, cute but not ravishing.

I like all types of women.  IMO every woman has something different to offer, I have tried BBWs, SBWs, playboy types, porn stars, girl next door types, IG models, pregnant women, big fake tits, small petite women, plain Jane's, smoking hot latinas, etc....  

Yes.  Many are great fucks....

Plain jane MILFS can be hot in bed.

But seriously ladies and germs,

....but it's only one part of the whole equation.

... to makes jokes from that kind of set up:  

A lot of conventionally beautiful celebrities aren't particularly sexy.  They might make nice arm candy, but they don't necessarily trigger a deep lust.   Of course I can't explain what does trigger that lust.  But something certainly flips that lust switch and it isn't usually the pretty faces.  It's also not likely the fugglies either (sorry.)  But something about how they carry themselves.  Makes me sweat.

knows how to glam herself up a little with makeup, is slender and can flash a little cleavage with an open collar blouse, it will get my attention every time.

A GND can be DDG without makeup; a Plain Jane can't.

Skills are more important than looks.
I've never liked fake boobs.  Nothing wrong with small boobs.
I prefer slender but have had great sessions with thicker ladies who are skilled in the oral arts.

Go with whatever floats your boat when it comes to the type of female that you like.

Yes?

First I'm going to distinguish between GND (cute) and Plain Jane (plain). And plain doesn't mean butterface, just plain.  

Hmm, I think that would just incite a diversion from who fits that category than whether such a category exists. It's all subjective, of course.

Being a woman, how much do you place on a woman's performance? Also do you place more value on looks than performance.

A plain Jane who knows what she's doing and can make my Jr happy will be in my rotation.
A great looker who can't f, has GPS or is pure eye candy, I will get bored with by end of first session

I've always had an overactive imagination, and there were plenty of ladies in everyday life who I fantasized about.  I dated (in my early years) lots of women who were not what would traditionally be considered beautiful, and the sex was just as good, sometimes better.  
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I've seen providers of all types and appearances, and usually enjoyed their company regardless of appearance.  
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Ironically, I can remember two providers who were so incredibly beautiful, that I had trouble performing.   Guess down deep, I felt they were out of my league.  But they were each very sweet, and made sure I was able to get the mission accomplished. That's what I remember most about them.

Once saw a provider going by the of Jane Smith; she was definitely a "Plain Jane"... average looking face with glasses.  What she did have was a great little body and wonderful skills to match. To quote an old Sammy Hagar song...this was one Plain Jane that indeed drove me insane.

I can't knock the hustle, but are you saying dead presidents better than live ones for providers?

For me it's probably 50/50. I love a sexually aggressive woman and sometimes I unknowingly book with providers that are very submissive. As hot as they may physically it definitely affects the session in a not so great way.

Even if she's a 5/6 in bed. I'll take that over a girl who is a 5/6 in looks and a 9/10 in bed.  
Looks I can always work with, you can't fix ugly..it's there and no dim lighting is gonna fix that.
Yeah I said it...

It depends on what you're looking for. As a relatively young man, I look for a pro to make my dick feel good. Maybe when I get old and will only be attractive to grandmas, then I will go for looks.

I get that but in my case I run into alot of curious but inexperienced providers who need guidance on pleasing a woman so the performance is pretty important to me also.

getting an inexperienced provider who needs guidance on pleasing a man.  Lol

I well second that statement.  I thought I knew what I was doing and stank.