i don't even like kiersey, i just at times have serious trouble determining the difference between infp and isfp. he reminds me of steinbeck, who i think is isfp. but he only reminds me of steinbeck during chronicles. he doesn't show personal warmth whatsoever, but some infps don't and the tumultoususness is more underneath the surface. he seems to reinvent himself almost all the time, and to me that seems a little more infj than infp. extraverted judging relies on the world to update itself more aggressively than introverted judgment, which is slower to adapt and has more shit to move.
i don't know, i'd like to hear more impressions. he seems like infp or infj to me now, i think i was overdoing the isfp thing. i think stuart murdoch is infj, i'm on the border for tom waits, and jimi hendrix i think is infp. bjork may be infj or infp, i really can't tell. i also started to think jeff tweedy may be an infp instead of isfp, but i just don't know.