I'm really loving this whole conversation, and it delights me that we have an AVN that inspires discussions like this. For me, in my fantasy, I want a girl who is utterly submissive; in reality, I want a girl who is strong, knows what she wants, and if she submits it's because she gets off on it. In my fantasy I want a slave to use as I wish; in reality I want a human being with whom I relate on whatever terms we happen to connect on. Does that make sense?
As for jokes at MC's expense, it depends. Please forgive a brief story: A slave I owned for several years (great girl, we're still friends) was given a "free day" every week as part of our consensual slavery contract. This was new to me, but I went along with it. Toward the end of her first free day, she said, "How do you like it?" "Not crazy about it, to be honest, but it's okay." "Why? Have I said anything that would normally get me backhanded across the room?" "No, no. Nothing like that. It's just that I can't say, 'Get me a whiskey, bitch.'" She laughed. A couple hours later midnight hit, and I said, "Get me a whiskey." She stood up and said, "What's the magic word?" It took me a moment, because she was not a brat; she'd never did anything on purpose to get punished. But then I got it. "Bitch," I added. She grinned, nodded, and went off to get my whiskey.