Hii! I'm a new and just discovered I'm an ENFP!
I definitely am good at seeing human behavior patterns.
A simple example I can explain is based on growing up with my sister, who totally had OCD and was a neat freak. So I saw a lot of patterns there (of course)
At college in one of my classes, I noticed one of my new friends used the hand sanitizer machine by our door, and thought to myself, oh thats funny I wonder why he thought his hands were dirty. And then the next day in class I asked "Can I borrow your pencil??!" and excitedly grabbed it before he answered. We got along well, and both were happy people, so I thought he wouldn't mind. He smiled, but I saw him staring at the pencil the whole time I was writing with it (I used it just for a minute!). I IMMEDIATELY just knew he was OCD, quickly linking this situation, to the hand sanitizer, and to the fact that he's very organized and I just had that feeling. I also bluntly then blurted "OMG you are OCD" and he laughed. He said it was true and thought it was funny how I knew b/c he's never told anyone that and I've only known him for a short period of time, where he had never really done anything OCD behavior like.
I'm naturally curious about why people do the things they do, and always see connections b/w their motives & actions, so I have a good idea about what makes people tick just by watching their behavior
I think it's different from Si b/c I don't remember what people do, just how they do the things they do. Like I remember more about intangibles than tangible things. I could not tell you what color shirt my friend was wearing or his last name (even though he has told me it 5 times!) But I can tell you his major, his goals for the class, and what he wants to do in life.