Easy, I want "reset," from FFV. That way I can say or do absolutely anything without fear of the consequences. If it turns out I said or did something bad I can bust out reset and begin the encounter over again. Someone bothering me? Punch him in the face and hit reset. Strike out with a girl? Hit reset and try another approach. Not sure how someone will take a startling revelation of character? Test it and and reset if they make a weird face. Drop a plate? reset! Take 20 minutes to help someone at work, hit reset after I've solved the problem and do it again in 10 seconds now that I know the answer. You get the idea.

My 2nd choice is sleep so I can cast it on myself and sleep whenever I want. My current relationship with sleep is based solely on abuse =(