Each time I run across a former classmate in the course of practice, I'm reminded of the line "Grades are golden but personality is platinum."
Someone told me this when I was a young student, before the price of gold overcame that of platinum. 😁
12 years on from law school, I have a vague recollection of how academically impressive (or not) many of my classmates were, but I have a CRYSTAL CLEAR recollection of how friendly, willing to help, and pleasant (or not) each of them were to me and others.
The latter sticks out "like a bright star in the night sky" in my mental image of the individual. I suspect it's the same for everyone else.
Classmates who said hello and were willing to share a note, a file, an outline, explain a point, give intel on a prof, inform you of an opportunity, lend a charger, or make an introduction.
These were platinum people and I remember.
People remember how they feel talking or dealing with you, above everything else about you.
By the way, those same qualities apply in the professional world after graduation.
Funny how the easiest task for building your professional network might also be the most important. 
