I get asked this question frequently by mentees and someone asked recently:
what did you do during your collegiate summers? You clearly aren't the type to have worked at the grocery store in between smoking blunts while playing Modern Warfare. I'm curious as to how what you did contributes to what you do.... (more)
One random tidbit for you to consider about grades and why they matter: I had a 4.0 at UT Austin for 7 semesters and that definitely made me an extra $70k, got me into Stanford for grad school, and drastically changed the entire course of my life - proving that GPA CAN MATTER.