> Our findings highlight that people’s personalities can be predicted automatically and without involving human social-cognitive skills.

I had noticed with with Netflix. After telling it enough movies I liked (over say 100) it pretty much figured me out and it knew me better than I knew myself. In other words, I'd see a movie description, watch the trailer and think "Nah, I wouldn't like it". But Netflix was telling me I'd like it, quite often after I watched it I did end up liking it.

On another note, I always tried to steer away from taking personality tests. I have a strange belief that once I know the "official" results it would somehow restrict my what I would attempt later in life. I'd think "Oh well your personality officially doesn't match, you shouldn't try that".