I'll try not to repeat what others already covered, but maybe add romanceable NPCs in various shops!
As of now going to the labor place is pretty objectively terrible in terms of money, the medical place doesn't offer much except more sex time, and once you buy 100 veggies you never really run out of food.
This is probably the "high hanging fruit" in terms of suggestions though, so I don't expect it to be implemented anytime soon d: