Other characteristics that sets this personality type apart is the fact that they always need to be doing something―standing in lines, or waiting for the bus is a punishment, all they can think of is how much time they are wasting and how they could have been doing something worthwhile. Speaking of which, they are lost without their day's activities planned. It's not surprising for people to refer to them as being workaholics―in fact, they find it difficult to simply relax or even fall asleep quickly at night. They are also prone to cut people off while the other speaks and have been shown to have a low tolerance for incompetence. People who fall under the type A personality types are prone to suffer from hypertension, stress, heart disease, and social isolation.
Type B personalities are less competitive, and while they give a project their all, they are not stressed about it―constantly worrying about the outcome and success. In fact, they are able to handle failures very well―taking them as obstacles and moving on to other projects.
Another factor that sets them apart is that they are extremely patient and maintain the same patience in the most tense and stressful conditions. They never give in to pressure and aggression, and they never get frantic about anything. They are also very tolerant, flexible, and adaptable in situations, and they hardly ever complain about things.
They lead a full social life, because they like connecting with people and forming strong emotional bonds with them. And being cheerful and entertaining by nature, they make friends easily.
These people tend to shirk from social or human interaction. Arranging facts in a logical order is what drives these people. You can find people of type C personified in accountants, computer programmers, etc. These people find it difficult to get out of their shell and communicate with other people, but are extremely competent when it comes to numbers and logic. A reserved nature is the mark of type C personalities, and they are cautious as well. Risk taking is not a very attractive option for these people who tend not to venture into something until they have gone over all the facts with a fine-toothed comb.
Being sticklers of detail and knowledge, and priding in backing every decision with research, they do not do well with criticism. They are also over critical of the people around them.
These individuals, which make 21 percent of the population, are afflicted by negativity such as worry, irritability, gloom, etc., and hardly feel self-assured. To avoid rejection, they avoid opening up and sharing their negative emotions. This causes them to suffer from enormous amount of stress which makes them prone to heart-related diseases. The studies show that as many as 18 to 53 percent of cardiac patients have type D personality.