Black and white thinking is actually full of shades of grey! shezbut give a good extreme example. For me ( fighting the BPD Dx and failing!) I am decisive- I know what I want and what I don't and fairly rigid in certain things ( EX: if I have a friend coming to visit the house must be visitor tidied- clean towels in the bathroom, personal items put out of sight, dishes out of sight, counters clean, no paperwork left haphazardly) But day to day I am flexible- papers that will need to be dealt with in the next 24 hours can be on the desk, the "to be filed" basket need not be emptied daily, laundry can wait a day as long as we all have a clean change of clothes ( for the auto accident that will cause us to dirty or clean underwear!); I would love to maintain my OCD home from years gone by- no husband and a roommate just as obsessed as I was- I had one new friend ask if I was living in the model apartment!

I believe that black/white thinking is only an issue if it leads to thoughts/actions that others would consider way out there- having strong beliefs or higher standards is not a negative, but recognizing when you are being 'black' in your thinking will help you to see others 'grey'.