I got a few private messages from applicants looking for advice in the 2nd round.
I'll give a summary of my application for those interested:
About 2 years of work experience indirectly managing 1 person (talked about learning the value of teamwork in my essays and how teamwork created a lifelong friendship and mutually beneficial relationship)
3.03 GPA (with junior college factored in, explained each failing grade of C- or lower and the extenuating circumstances I faced on a quarterly basis)
690 top GMAT score (added optional explanation explaining the circumstances surrounding my low scores all 3 nights before each test)
Non-brand name school (talked about how I was able to better develop myself at a lower brand school by becoming involved and having confidence that my intellectual ability was on par with everybody although the stats didn't show it)
All in all, I would say what probably distinguished my application the most from others is my "realness." I don't want to say too many specifics, but I made sure that I came off as genuine; adcoms all know the life of a college student, and sometimes, dealing with crazy exes or lack of motivation are valid reasons behind lower stats. Although I can't go back and change it, by applying to HBS, that showed that I wasn't some lazy person; I just need the right target to shoot for. I did not make excuses, but made sure I laid out the facts for them to see so the adcoms wouldn't make wrong judgments themselves. I am just going to be myself during the interview and see where that goes, because HBS was always a stretch for me to begin with!
Edit: I took the bait on a couple of free profile assessments by admissions counselors. I ended up not using any of them because they all told me flat out that I wouldn't be a strong candidate and I should focus on other schools (non m7). I felt that most of that criticism was due to my GMAT/GPA, which made me realize that those are probably the weaknesses I should address. For example, I got a good score (710 Q47 V42 IR 6) on the official GMAC practice tests, which should be indicative of ability to score highly on the real test, since they're made by the same people! Just because I had some crazy circumstances the nights before my official tests doesn't mean that a single test should hold me back! The low GPA was a little trickier since it was 4 years of steady grades, but I just made sure to explain each grade C- or lower (considered failing) by naming the reason and what I learned from it. Make sure you leave time to add some compelling optional portions!