I was badly depressed in 1999, partly because of the lack of money. I was a young INTJ desperately willing to enter life, abandon my extreme shyness, willing to learn some of the things people usually do. I found MBTI probably from some psychology related site, or some related to mental development, social skills or something of the kind.
We invested in it as a team building exercise at work. I found it fascinating, did some web research
Same here. I had to take an MBTI test at work just before a team building day thingy. I tested INTP, read the brief description in the handouts we got and then obsessively read everything I could find online for a whole weekend. I was fascinated by it all and blown away by the accuracy of the desciption (nice to finally not feel like a total freak).