I wouldn't say I have one single favorite. I have a couple that I replay in my mind over and over. Among my favorites are where I broke into a house to find some things worth stealing and selling for money when the home owner, a sexy little thing, comes home. After getting the drop on her, I finish searching and find nothing worth taking that wouldn't be brutally obvious. But as I look at my unintended witness, bent over her own bed in her skirt and heels, my cock grows nice and hard and I decide I'm not leaving empty-handed and I proceed to rape her holes for hours before leaving there on her bed, covered in sweat and cum.
Another favorite is trapping my boss in her office and raping her repeatedly. After I'm done I show her I had a camera hidden that took pictures that make it look like it was consensual. I use the pictures as blackmail to Rae her in her office every day for the next few weeks.
My last favorite fantasy is me forcing my way into my neighbor'S apartment and raping her for hours. When I'm finally done raping her, I've broken her. She showers and returns from the bathroom in a negligee, pantyhose, and stilettos and presents herself, calling me "Master" and begging me to take her as my slave.