The Myers-Briggs test is generally seen as a bit pseudosciencey these days. 
It kinda relies a lot on the Barnum Effect.
I remember when I did it back in my twenties, I had a tendency to consistently come out really close to the border on everything except Intuition vs Sensing (where I came out as strongly intuitive). My result was ENFP (Campaigner), but when I redo it, there's generally a high chance of something different each time and very borderline results. The flattering "explanation" people give for this is that I must have a balanced personality.... Yeah, that'd be nice if it was true! 
It can be a fun tool for self reflection and thinking about how you think, but I don't think it's sensible to get too attached to the result it gives you. Perhaps my approach to questioning the results and veracity of the test itself is what's really telling about the root of my creativity. I always like to look for the reasons why things are as they are, the deeper motivations and the less obvious solutions to problems, and I'm very interested in how people come to think in certain ways, and how they can be manipulated or drawn into believing things based on emotional reasoning.
