I heard there was free food, so I decided to check it out. There wasn't any free food, but the people were okay.
But in all seriousness, I took a random MBTI test, got a result, and said, "WTF is this?" I didn't know what was going on with all of the letters, so I decided to investigate further. I'm no longer into MBTI, but I like to hang around. This is a pretty sweet community.
But the practical side of things never even crossed my mind. I don't know that MBTI is very practical to begin with.