One that says things in order to gain attention and wants to impress others. One who has a carefree life and is almost envied by others who are not as charismatic. One who sparks interest in his ways. People want to know him. Some that you would like to be but can't. A person who has "it". What ever "it" is at the time. "It" has evolved.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.