I'm more excited for weird little things like beekeeping and indoor planters and more recipes/harvestable plants.
Contrary to my own personality, I tend to create sims who are skilled outdoorsmen; beekeeping holds a lot of ingame appeal for me. This sounds silly, but I will find it very fun!
From what I have read, zombies will be fond of destroying other sim's plants. I will definitely want those peashooters for my community gardens. Still, they would be fun to play. [cue obligatory nefarious chuckle]
If a witch changes lifestate and back again, I wonder if their abilities shall be retained or if they must relearn each spell from scratch.
Generations brought chemistry to the logic skill, I wonder how it will sync with alchemy.
EDIT: With WA in mind, witches should be able to fend off mummies with ease (I shall abuse this factor gleefully), and maybe their ice spell can disable fire traps too.
EDIT: In fact, the first thing I shall do is make an evil witch a celebrity. Paparazzi = endless supply of victims.