I used to be a worse sinner. Read St. Augustine's story and you see how he completely turned around. If you are familiar with Fr. Corapi, he surely was a lost soul before the Lord got him. Jesus truly loves sinners.
This leads me to think of the people who are unattractive, unkempt, annoying, or even obnoxious, the kind that normally turns others off. The lesson to me is to never look down on any of them because they may one day be transformed by the Lord into saintly creatures.