Something I really don't like about the older games besides the dated graphics is the way sims move around. I haven't played the Sims 2 in a long while but recently I was playing the Sims 3 and the sims move around so stiff and unnatural, it's almost robotic looking. The thing I love most about the Sims 4 is the Sims themselves, the way they move and express themselves. It makes them seem much more alive to me despite them some what lacking in the unique personalities of the previous games.