Flaws: When helping someone sell stuff, trying to tell them their item that they think is worth so much you could barely give it away. Also, I spend ALOT of time on CL and ebay, but I spend more time browsing than I should since I have too many things to list already
Failures: Not really anything major (knock on wood), I have missed a few voicemails from people on CL and completely forget to call them back til a few weeks later when its already gone.