1 - NPCs that you can find and hire to farm, cook, and craft for you.
2 - Animals that you could tame with their own bed, toy, and food.
3 - Special NPCs that you had to find that taught you how to fish, fight, etc.
4 - Lawnmower!
5 - Animal farming that worked well.
6 - Lots of special enemies that had abilities specific to them.
7 - Aquarium (Fish tank?) that showed swimming fish.
These Starvation features reproduced as modlets would be amazing.