What's your type? I'm an INFP.
The most popular personality tests these days are the Kiersey Temperament Sorter and the Myers-Briggs Type Indicator.
Both tests split people into 16 different categories using four major frames of reference.
Are you extroverted (E) or introverted (I)? Extroverts become energised when surrounded by people, while introverts prefer thoughts and emotions to activity and spoken words.
Are you intuitive (N) or sensory (S)? This refers to how you process information. If you rely more on facts and experience, you are probably an S. If you focus more on possibilities and have an idealistic mindset, you're likely to be an N.
The next indicator is whether you are a thinker (T) or a feeler (F). Thinkers tend to be more analytical, basing their decisions on logic and objective criteria. Feelers place greater emphasis on subjective criteria, and are considered more empathetic and expressive.
Lastly, decide if you are a judger (J) or a perceiver (P). Those who use judgment to organise their life enjoy making decisions.