a few suggestions of mine i think Sim lovers would like to have
1.I think it would be good if your Sims could have a shack/beach-house type thing.
2. if your Sims could go to the beach and have lifeguards there and lifeguard could possibly be a job for Sims. (haven't got all the expansion packs or Sims 3 so i don't know if I'm putting suggestions in that don't need putting in)
3. Sun baking and sunburn
4. have an extra block of land to visit your farm (if you choose to have one) and choose what animals you have like chickens, cows, pigs, horses (ridable) and donkeys
5. grow crops and sell them on your farm or to supermarkets and the same with the meat (animals) - i thought the turning animals into meat would offend some people but you obviously not be able to see it happen, but its still probably not a good idea...
6. i really like the "boolprop testingcheatsenabled true" cheat so i would love to see that in Sims 4
7. teenage pregnancy, abortions and miscarriages
8. students not have homework everyday and go to extra curricular activities like netball, basketball, horse riding music lessons, art etc.
9. children to not come home from school one day and the have to send out a search party for them.
10. more cars
11.more hairstyles
12. I would love to hobos that beg for money and sit on the pathway, and look through the rubbish bin i think that could be a load of fun
13. to be able to walk from one shop to another without getting in a car or going onto a load screen.
14. an easier way to buy clothes instead of clicking on an item and the on the shopping trolley (haven't played Sims 3 so i don't know if I'm putting in suggestions that don't need to be put in)
15. stalkers that continuously come over to your house knocking on the door and wonders by the house at night and looks at your bills and goes through the rubbish.
16. garbage collector every week.
17. choose the height and fattness of your Sims and hip and chest size for women and teens.
18. snowing in winter, leaves on the ground in autumn and lots of colours in spring. (once again i haven't got all the expansion packs or Sims 3 so...) snow skiing.
19. a big graveyard, iv tryed to make a graveyard before i loved it because at night lots of ghosts came out but they turned other tombstones around which really annoyed me! and my graveyard was full on the biggest lot you could get.
I'm out of ideas but i hope you like them and i hope you would consider using some of them