After careful consideration, I have decided that if I could have any superpower, it would be the ability to fall asleep at will. Would it help me protect the world from whatever threats it might face? No. Would it help me achieve total world domination should I go the villain route? No. But sleeping at will would improve my life far more radically than possessing Herculean strength, or a quiver of thunderbolts, or a gaze that could turn people to cinders.