I've found usually the crazy ones are good shags.
I'd go along with that, I'd guess 7 in my top 10 have been a bit bonkers in some way (not totally crazy though).
The other end of the scale was a real cute girl next door type, made me wonder if she knew what she was doing to start off with, she did and turned out to be pure filth. I think the surprise of it added to the experience.
I agree. I've known one that I never punted with, nor did she know I ever had, and she was prone to having dramatic mood swings. Also very selfish and narcissic at times. Ruthlessly manipulative of men too because she had developed the skills. Intelligent girl but barmy and very wasteful. She earned big and spent big and has nothing to show for it. I think they are all a bit like that.
Reading this has made me remember one prossie in particular who I did punt with, matches almost perfectly. First punt great, second punt great sex, long over run but the 'act' started to disappear and the real girl started to show herself. Third punt, ridiculously long over run and I got to see the girl rather than the prossie acting - self obsessed, selfish and manipulative but also very insecure and self demeaning. Her personality doesn't fit with bonkers in the current sense though.