Lack of Long-term gameplay in TS4

I'm a rotational player and always have been. I can tell anyone all these Sims are the very same. It doesn't matter if they added ten more trait slots they would still all react, think and be the same. I'm not one to finish tasks nor complete aspirations anymore, did that in TS2 for a time but then decided no, I play my way, they will dance to my tune and the beat of my drum. I don't need a long time aspiration goal what I need is differences and diversity in reactions, consequences, nuances, conversations, memories, depth to their personalities, reasons why they care or don't care. Then it would be worth it to build ten different Sims and play them in a world and rotate between them. But if they are all going to like the stereo, all like the TV, all like the pc, all like basketball, all like whatever, or all get uncomfortable no matter the circumstances and or all want to hug somebody then there is no point in me playing at all. The problems to me is the Sim personality. Do they ever get nervous? Scared? hate anyone? remember anyone? remember Summer Holiday just insulted them yesterday? No, they know nothing. Know they are married? No they will flirt with anyone. Just pixels people dress up and scream oh look, I'm so diverse. But at least in TS2 they know they finished an aspiration...and talk about it to others....TS4 has no regard for any memory at all.