Never really had a mentor... definitely not related to the fact that I barely survived most of my classes / didn't work with anyone particularly senior to me at my last startup. But I feel kind of good thanks to this question, cause I realized I'm a bit of a mentor for several kids who asked me for a lot of advice when I was TAing, and an online friend and a few IRL ones who are just one or two steps behind me gives me a lot of opportunities to.... uhh.... ment people.