That question reminds me of a Sunday talk given many years ago regarding sins. The brother explained he used to have a bad habit of "scanning women's bodies" with his eyes. He then asked the audience to take a moment and write down our bad habit(s) to work on. I glanced over at my husbands notebook...he had written "bad habit to break: scanning men's bodies".
Seriously though, my worst quality was being a judgemental little wench.