Well, my first choice, clearly, is to orgasm to the point of cardiac arrest. They would have to provide a selection of potential "executioners," though.
Failing that, it would be best if I was killed by a weapon so powerful that I was not even aware that I was about to die before I was dead. Under that restriction, I believe the most optimal method would be to proclaim that I am a rapist cheater scam-artist that thinks women are stupid cows to Judge Judy, and then be promptly scorned out of existence.