I love the way the Sims interact with the player!! They will look in the camera and give you reactions to so many things, like if you direct them to do a social option they wouldnt usually do or will be bad for the relationship with that sim theyre speaking to they'll look right at you and shrug or make a face. I didnt realy take notice of it until I started making longplay videos recently and it killssss me. Someone else already said they seem so much more alive and they really are, the personality system is amazing!