Well, I took the test today and scored INTJ, but then again, I was somewhat picky about my answers. My reflections are that I deal with the outside world with my sensing function very well, and my real strengths (which I lean to and tend to develop) are in the inner world where I work with N a heck of a lot. I hate it when the phone rings, I am totally spaced out and find it hard at times to pull myself back to where these people on the phone are at.
Graphic design is creative, and should come to an N quite easily. My feeling is that N graphic designers use white space very well indeed across a wide range of media. I recently saw some work on web pages using Ems for design and balance, it was terrific and I was quite envious. All done by an INTP web designer.