I love it when I can tell a Mistress is familiar with my desires, especially if we have never sessioned. I'm so appreciative that they take the time to consider my written desires, and sometimes even consult other mistresses who are already familiar with me and what buttons to push.
Nothing turns me on more and is more memorable than the sight of my mistress in a strap on, both before, during and after ravishing me. I especially like watching in the mirror as I am taken from behind. Its amazing to have that memory of servitude engraved.