A lot of things I miss are already mentioned here. Some have not
- groceries and fridges that actually have to be stocked (sims 2)
- walking around with babies (sims 2 and 3)
- giving baby baths (sims 2)
- getting baby bottles from the fridge and having to clean up empty baby bottles and dirty diapers (sims 2)
- pool slides (sims 1, 2 and 3)
- sims open drawers on kitchen counters, doors of dressers, car doors (sims 2)
- normal sized telescopes (sims 1, 2 and 3)
- pet dragons (sims 1 and 3)
- sims crawling to each other in bed and sleeping with arms around the other sim (sims 2)
- one central npc for cures for all supernaturals from all packs (gipsy in sims 2 nightlife was updated with each pack)
- the hourglass reward from the aspiration reward store (sims 2). I forgot the exact name but what I liked was the option to add or take away days from the sims lifespan, not completely resetting it
- sims children playing together without toys. Just click on the other child and play red hands, tag,... (sims 2)
- 2 separate swatches for furniture, for example choose sheets and bed frames separately, or counter tops and doors,.. (sims 2)
