I vote for graphite on paper. Ink will run if the paper gets wet. Of all the damage that has occurred to my papers, water is the most common. I keep a copy of important phone numbers written inside my wallet in case I ever lose my phone. Between an unexpected rainstorm, to an unchecked pocket before putting pants in a washing machine, to a spilled drink, I have gotten my wallet wet several times. Every time I used ink, I had to rewrite the list, but now with graphite, it isn't a problem.