I've taken an MBTI clinically and also online. All the results were always the same, but I tend to not give online tests any credence. I prefer to view the profiles as a guideline or general description of the personality, however - I personally believe people have more attributes or less rigid categories of personality. With that being said it might provide helpful insight or perspective to read up on the personality profile you receive, it could help describe or call to attention some features of your personality that you can then work on, strengthen.
Long post long: INTJ was my outcome.
I believed myself to be more perceptive than judgemental, but that was the result.