Type 1 diabetes: Frequent urination, unusual thirst, extreme hunger, unusual weight loss, extreme fatigue, irritability. Type 2 diabetes: Any of the type 1 symptoms frequent infections, blurred vision, cuts or bruises, tingling or numbness in the hands or feet, recurring skin, gum, or bladder infections.
Sociopaths are often unable to control their behavior and their expressions of annoyance, irritability and threats when faced with situations not appealing to them and they often tend to resort to threats, aggression and verbal abuse.
On a related note, passive aggressive persons are master procrastinators. While all of us like to put off unpleasant tasks from time to time, people with passive aggressive personalities rely on procrastination as a way of frustrating others and/or getting out of certain chores without having to directly refuse them.