Very nice to see someone else comfortable in their subjectivity; too many act as if their opinions were facts and their tastes universal laws. I feel free to be free with my opinions precisely _because_ I know that I'm not trying to express absolute and universal truths.
Marilyn was one of the most beautiful porn stars in terms of face and body, and certainly had a voracious sexual appetite, but for me she did not have the same level of innate eroticism as say Juliet Anderson, Kay Parker or Lili Marlene. It is just a question of personal taste.