Sims 4 graphics are better but I prefer Sims 3 art style myself. It isn't completely realistic but it suggests it is. It makes reality a little bit better so to speak. Sims 4 is further away from reality and some will prefer that, I don't.
I don't agree Sims 3 moves into uncanny valley. The definition of uncanny valley is "a hypothesis in the field of aesthetics which holds that when features look and move almost, but not exactly, like natural beings, it causes a response of revulsion among some observers." For me that's for instance the taxi driver in GTA when he looks over his shoulder.
https://s1-ssl.dmcdn.net/MflZh/526x297-0qC.jpg
He gives me the creeps. Like Yul Brynner did in Westworld (a film that handles about robots that get on the loose). I know CC can make sims in 3 (and 2 for that matter) highly realistic and therefore maybe uncanny, but that's a matter of choice. The vanilla game is far from uncanny, it's just not realistic enough for that.
What I prefer in Sims 3 (and I know it's the opposite for others), is that it looks more 'crispy'. It all seems a bit more mellow and 'sweet' in Sims 4. I can imagine someone prefers that (like people prefer different music styles) but I don't.
