I've seen Anna when she was at LMP, she was quite passive but enjoyed the attention, possibly had a child, more mid-20s and I've heard first-hand from someone who's seen Elizabeth who has an incredible slender body, but seemed to lack passion in the kissing.
It's your call, but I doubt either will be a raver like Charlie/pornstar Chantelle Lee, but not as long in the tooth either. How about Ruby?? Heard good things about her enthusiasm.