Hi Samminator,
Short and sweet post but to the point! You are correct that while some people may be good, their goodness is not always an indicator that they're right for you. However, sometimes connecting with "bad" people can bring about a learning experience; whether it is you that brings beneficial relations to the table, or perhaps you learn from the bad person's faults... All relationships, good and bad, bring about social growth.
I am a firm believer and preacher that you are the company you keep.
:)