The art of getting the most out of a person is compartmentalizing. You can't throw away a person because they have bad in them. The best of us have some worst in us and the worst of us have some best in us. No human is 100% anything. Learn to refrain from using words like 'you always' or 'they never' because it simply isn't true. Learn how to separate the meat from the bones. PS - there is always meat.
Romans 12:18 - NIV 2010 - If it is possible, as far as it depends on you, live at peace with everyone.