@Stanston
Not only is every performer different, but every user is different, too. Some guys like big boobs, others like more petite women. Some like shoes on, some like stockings with shoes off, some like bare feet. Some like aggressively sexy performers, whilst others prefer a more demur approach.
It's impossible to please every user with every card. I think they do a good job with variety to make most of happy most of the time.
I am not sure personal preference determines how much a person likes a card though...or at least if it is entertaining to the most people. Talia Mint is about as far away from attractive as can get when it comes to my personal preference. If I saw her on the street I wouldn't look twice, but her shows are very good, she is very talented, varied, flexible, sexy, and a nympho who loves sex....so I love her shows.