I am...
INFJ- Advocate (surprised me how accurate this was)
..friends and colleagues will come to think of them as quiet Extroverted types, but they would all do well to remember that INFJs need time alone to decompress and recharge, and to not become too alarmed when they suddenly withdraw.
INFJs take great care of other’s feelings, and they expect the favor to be returned – sometimes that means giving them the space they need for a few days.
..Really though, it is most important for INFJs to remember to take care of themselves.
The passion of their convictions is perfectly capable of carrying them past their breaking point and if their zeal gets out of hand, they can find themselves exhausted, unhealthy and stressed. This becomes especially apparent when INFJs find themselves up against conflict and criticism – their sensitivity forces them to do everything they can to evade these seemingly personal attacks, but when the circumstances are unavoidable, they can fight back in highly irrational, unhelpful ways.
It's pretty rare according to this:
The INFJ personality type is very rare, making up less than one percent of the population