I'd love it if it was like a Willy Wonka, Adventure Time or Wreck-It Ralph's Sugar Rush inspired type worlds (instead of like Sims 3's Katy Perry Sweet Treats : /).
If it was a fantasy candy factory idea, it could be fantasy plants that grow candy or sugar (let us finally have sustainable sugar produce), active chocolatier career and/or candy making could be a skill (expanding on the B&H candy machine/shop idea).
If it was like an actual fantasy land, each candy type could be a sustained or most likely mood (toggled by a trait somehow) if it doesn't go full on occult. Sour = Tense/Uncomfortable, Spicy = Angry, Happy = Sweet, etc. and combos Spicy/Sweet = Peppermint for example.
I love fantasy and the occult, and I'd love a candy land like world XD