"The INFJ type is believed to be very rare (less than 1 percent of the population) and has an unusual set of traits. Even though their presence can be described as very quiet, INFJ personalities usually have many strong opinions, especially when it comes to issues they consider really important in life. If an INFJ is fighting for something, this is because they believe in the idea itself, not because of some selfish reasons.
INFJ personalities are drawn toward helping those in need: they may rush to the place of a major disaster, participate in rescue efforts, do charity work, etc. INFJs see this as their duty and their purpose in life. People with this personality type firmly believe that nothing else would help the world as much as getting rid of all the tyrants (though preferably in a non-violent way). Karma and similar concepts are very attractive to INFJs.
These tendencies are also strengthened by the fact that INFJ personalities have a unique combination of idealism and decisiveness. This means that their creativity and imagination can be directed toward a specific goal. Few other personality types have this trait, and this is one of the most important reasons why many INFJs are able to eventually realize their dreams and make a lasting positive impact.
INFJs are masters of written communication, with a distinctively smooth and warm language. In addition, the sensitivity of INFJs allows them to connect to others quite easily. Their easy and pleasant communication can often mislead bystanders, who might think that the INFJ is actually a very sociable person.
INFJs take great care of other people’s feelings and expect others to return the favor. Unsurprisingly, people with this personality type are very sensitive and vulnerable to conflicts. Even the most rational INFJs may find it quite difficult to not take criticism personally—this is the INFJ’s Achilles’ heel. If someone with an INFJ personality cannot escape the conflict, they will do their best to deal with it head on, but this will result in a lot of stress and may also potentially lead to health problems or highly irrational behavior." (http://www.16personalities.com/infj-personality)
I can just about completely agree with this. I love people, but I do need time on my own to recharge. It's very odd. People see me as this completely outgoing, but I always tell others I'm shy. Honestly, I just don't always know what to do with people. I love them though. I love to relate and to help. As it says, if I could rid the world of evil I would.
I plan to look this up more. I'm interested in seeing what else I find. :)