"Normally I don't watch myself, because I'm not very objective"

Nancy McKeon's quote suggests that she is unable to be neutral when it comes to her own work. She realizes that she is unable to be unbiased when it involves her own efficiency, and so she chooses not to see herself. This can be taken an indicator of humbleness, as she is aware of her own restrictions and also is not attempting to be excessively critical of her very own job. It might also be viewed as a sign of positive self-image, as she fits enough in her own abilities to not really feel the requirement to continuously monitor her own efficiency. Inevitably, the quote suggests that Nancy McKeon is comfortable enough in her very own skin to not feel the requirement to constantly review her very own work.