The first time I heard about MBTI, I had to take an online test for my high school psychology class. I think I tested INTJ at the time...weird.
I forgot about it until my counselor in college told me to go to the career center and take tests and whatever. MBTI was one of them and I tested INTP. That was 2 years ago. I spent 2 years thinking I was an INTP and reading about it on the internet.
Then pretty recently I found this site, and I started thinking I was INFP. And yeah, hopefully I'm right this time.