Knowing what is Phlegmatic as it relates to a personality type will lead you to one word above all. This person will always be described as a NICE person by the other personality types. How do you know what type of personality you have? You can try this free online test to get your basic temperament type, and then read the resources on this blog for greater detail.
The overview of the 4 personality type model is explained here in a less intellectual and easy to understand way! This post puts the spotlight on the Phlegmatic personality traits. Find links for the other personality types at the end of this post.