I think anything that engages the crafting professions would be good...the more stuff added the better.
Woodworkers for furniture and accents inside
Botany for gardening
Mining could do some sort of crystal/shard cultivation.
Blacksmithing for stoves.
Small ponds for fishing/fish raising.

The possibilities are nearly endless. I would love to see an open ended system that could be easily added onto for new items/features.