Say you need to kill off a character, maybe in an elemental battle, or maybe on a lonesome journey of them versus nature. Would you rather write a character dying by the cold - frozen in a magical blast of ice, slowly freezing to death in a snow storm - or by heat - like in a house fire, or in the desert? Is there one you feel you could pull off better? Do you think one is scarier than the other?
Would it matter whether or not the character was the protagonist? How might the themes of the story affect your choice? Would you chose fire for a fast, sure death? Is ice necessarily slow, or less certain? Can you unfreeze someone and save their life? Can you magic ashes back to life?