well, the myers-briggs is the original - the kiersey is the same
  thing - they just expand upon it, and their explanations are
  much better I think than the original myers-briggs ones. if you
  look up INFP FAQ (or maybe it's MBTI FAQ) there's a great
  description of INFP that I helped be a part of waaaay back in
  1995 when there was a mailing list online for INFP's run by a
  man called Chuck Shephard - I'm still friends online with a few
  people from that list from years ago. At its heydey, it had over
  1000 members. I was lucky enough to have some of my description
  show up in the FAQ - maybe a sentence or two came from me. It's
  such a freeing feeling to find ppl who can 'get' you and you
  'get' them. "