myer's briggs

take the test here. what it's testing you on:

• How they focus their attention or get their energy (extraversion or introversion)
• How they perceive or take in information (sensing or intuition)
• How they prefer to make decisions (thinking or feeling)
• How they orient themselves to the external world (judgment or perception)

i'm an INFJ (tho i feel like i didn't used to be)

Introvert(22%)  iNtuitive(25%)  iNtuitive  Feeling(25%)  Judging(67%)
You have slight preference of Introversion over Extraversion (22%)
You have moderate preference of Intuition over Sensing (25%)
You have moderate preference of Feeling over Thinking (25%)
You have distinctive preference of Judging over Perceiving (67%)

wikipedia calls me a "Ethical Intuitive Introvert"

I – Introversion preferred to extraversion: INFJs tend to be quiet and reserved. They generally prefer interacting with a few close friends rather than a wide circle of acquaintances, and they expend energy in
social situations (whereas extraverts gain energy).
N – Intuition preferred to sensing: INFJs tend to be more abstract than concrete. They focus on the big picture rather than the details, and on future possibilities rather than immediate realities.
F – Feeling preferred to thinking: INFJs tend to value personal considerations above objective criteria. When making decisions, they often give more weight to social implications than to logic.
J – Judgment preferred to perception: INFJs tend to plan their activities and make decisions early. They derive a sense of control through predictability.

i'll leave it to you to judge if i am actually an INFJ, but i think it's pretty close.