I have to go with Anita Pearl. Especially when she had her hair dyed black she was like a freaky little vampire from Transylvania or something and that totally turned my on.
I have to vote for Jessica Difeo as well. She has that nice soft look to her that just makes you want to spend a weekend with her in a secluded nice log cabin next to a roaring fire while it's snowing outside and go at it over and over.
Heather is definitely nice too, but she is more of a...
I voted for Tera Patrick based on overall quality of photo shoots and not taking into account her tattoo sleeve. I like tattoos in the "right places" but not when their whole arm is covered in them.
If you reopened this thread a year from now I might vote differently though.
I would have to say Audrey Bitoni, I like her style and her voice. Admittedly the scars from her past cosmetic surgeries show up sometimes but overall she is awesome.
I can't see any of your pictures, they either don't work or have been removed.
When you say "short haired brunette milf" the first one that comes to mind is Dylan Ryder
My personal favorites are
Tera Patrick
Audrey Bitoni
Jayden James
Jessica Canizales
Kyla Cole
Mandi Rose Fanelli
To name but a few, to be honest I am just a brunette freak. These should start your artwork off pretty well they all have superb form and flow.