I presume this is a throwaway/anonymous account, for obvious reasons. It's a smart exercise, and I'd be interested to hear more about what they told you - not to know how flawed you are* but to know whether multiple people picked out the same flaws, or how accurate your appraisal of your own flaws was compared to the results you got, or how social distance (family > childhood friends > college friends) correlates with accuracy of insight, if at all. So I nominate your worst quality as a tendency to tease with provocative ideas but not follow through with interesting details :-)

* Unlike me. I'm perfect and I won't listen to anyone who says otherwise.

Seriously, well done and thank you for sharing your insights so far.