Everybody is different. You can try to find their good side or their bad side. What are you looking for though? Much of the time just the pure aspect of trying to find the good qualities of a person versus looking for their bad qualities will create a much more peaceful friendship. Now seeking to help them overcome their bad qualities is always good, but the question is more, what do you focus on?
It would be as if I had half of my face burned in a fire, would you be always turned off by the ugly half burnt face? Or could you try to overlook it and look at the half that wasn’t burned, and looked pretty good. Lol. <_<