So I just made an ENFJ friend a Superclose friend.
I read her like a book. She was startled that I could "see past what she "said" to see what she was actually "saying". Apparently I've done it a few times with accurate observations, but I went into depth on an issue and really hit her hard with how well I "knew" her.
She said only 1 or 2 people have ever done that to her in her entire life and I heart MBTI for this. She's great