So thinking about the best shags have had (and been doing a fair bit of that recently ) I would say the real down and dirty girls come from a more humble background.
Yes there are the ex 'catholic private school' types who let rip once they are unchained from all the suppression but normally, find those from a better off background a bit ordinary in the sack.
I know more likely to get a mouthful of shit from the girls from a rougher background if they think you deserve it, but would say they know how to dress, act and open minded in the bedroom than the jolly hockey stick brigade.
So, what's your preference for a top shag...a girl from the wild side, chewing gum & tats, a tarty look or coy cinderella types?!
In my own experience, the 'catholic' types can sometimes be the worst shags, if you define a good shag as a woman who participates and gets as much out of it as you do. Have had two GFs of Anglo-Irish-Catholic origin, and the second Mrs Nuts was the same. They're perfectly OK about you doing whatever you want, but they tend to be a bit supine.
Have not had much experience of working class, tatted-up sluts, but they never had that much appeal to me. Nice middle class girls, reasonably well spoken, who can get down and dirty with a bit of encouragement are much more like it. Actually turning them by getting them to do slutty things is the best turn-on of all.
My current bird is a nice middle class type. Have got her into wearing all kinds of tarty underwear, and she's realised she loves it too. She's also realised she has some slightly sub tendencies she didn't know she had, which only adds to the fun. Never a dull moment...