Let's discuss tits and asses. While I love both the slender frame of a character like Kitty and Jean, with smaller breasts and asses, I also enjoy the more curvy frame of a character like Emma and Storm, with larger breasts and larger asses. If I had to choose one or the other though, I would definitely go with the more slender body type of Kitty and Jean. Those toned bodies are too sexy. While the smaller breasts would leave less to play with, they would fit better in your hand and allow for more flexibility when it comes to kneading the soft flesh in your hands. As for the ass, the more toned ass would be more muscle-ly feeling in your hand, as opposed to the more fatty feel of Emma's or Storm's. I think this would be more fun to play with. But you also have characters such as Rogue, which is a mix of the two. Rogue would be very fun to touch and feel, due to having the best of both types.
In conclusion, I like titties and asses. Thank you for attending my TED talk.