Nah. I enjoy the fantasy, but for the sake of power and domination more than anything. And that side of me only really comes out when I'm in a sexual state of mind. I can reach the same level of arousal irl just doing more "conventional" dom type stuff during sex, so there's no reason more me to have to kill or mutilate somebody just to get off.
That aside, I'd never want to actually harm or kill anyone anyway, and I find real-life corpses and gore extremely off-putting. If I look at real-crime photos or any pictures involving graphic deaths, I get a little sick and just feel awful for the victim.