Simple. Would you rather [positive A] or [positive B], or would you rather [negative A] or [negative B]?
Examples:
A: Would you rather be invincible but live on a very low income, or be rich beyond your imagination, but die 20 years earlier than average?
B: The second one. Would you rather eat a large amount raw sewage or have one limb removed (you don't get to choose which one)?
...etc.
I'll start (obviously):
Would you rather messily kill 2 people in a long drawn out and painful knife war, or kill 20 people at the touch of a button but never have to see or face the consequences?