For The Sims 4:
- add better books management, this one can be really unhandy. Seeing what books on the shelf have been already read would be good, also an option to have different books on different shelves could help finding the right one. Also a possibility to buy your own books; in The Sims 3 I think we received our books by post. More book types (like history, economics, philosophy, biology, etc.) could be nice. Possibility of choosing the book cover could be nice too.
- we should be able to choose different career paths after we quit. It's pretty bad that when I go with the bartender in gastronomy I can't really change my mind and go as a cook.