If you have been working for any amount of time, you have most likely have taken the Myer-Briggs personality indicators (introvert v. extrovert; sensing v. intuition; thinking v feeling; and perceiving v. judging). Here is an infographic created my mbti that has been broken into five sections. It is pretty informative and goes on to show what types of indicators prefer which types of social media.
The about graphic describes the various characteristics of the Myers-Briggs personality types and how they would be inclined to use social media. There are 4 types that can combined to create 16 "personalities." To enlarge picture, just click on the image.
Do You Use Facebook
This is an graphic on how your particular personality type would use Facebook. It seems like extraverts and intuitive individuals prefer using Facebook.
Social Media Use at Work
This graphic explores how different types use social media and the web at work and their predisposition to share information based in being an extrovert or an introvert.
Are You LinkedIn?
Individuals who are considered extroverts, thinking, and intuitive seem to prefer using LinkedIn over other personality types.
Although Twitter is not as widely used as other social media sites, there seems to be a bias toward those who show more intuitive indication in their personality type.