Failure to use DSM-IV-TR diagnoses Use of idiosyncratic disorders that do not meet Frye or Daubert standards Concluding that a non-psychotic mental illness qualifies as mental disease Concluding that a deviant, bizarre or unusual crime is evidence of insanity Adding new data in the opinion section Concluding a lack of volitional capacity without rigorous analysis and supporting data Mentioning disposition or future dangerousness if not applicable Desire for a "just" outcome (to the detriment of accuracy, objectivity)