I regret not working harder in college. There were a lot of hours spent either drunk, on drugs, or hungover. I did a lot but I still feel like I should've spent less time having fun and more time working with people, being involved in more video projects, and doing interesting things around New York rather than staying in my little neighborhood getting drunk in the same bars or apartments with the same people. I feel like I could've been a lot closer with some of my peers and they could help me further myself both personally and professionally today if I had developed those relationships and work more during that period of time.
I have the same regret insom. And I think it's a fairly common one. The only resolve I take from it, personally, is that I've been at least lucky enough to even have college as a choice in my life in the first place.