Actually, this is definitely the trickiest one. How not to go overboard, what’s an appropriate gift? Everyone has a different relationship with their boss, but here it’s best to try and blend traditional with some casual flair.
A formal serving set and table linens always make a thoughtful gift - but remember to think about their living space (if you’ve been) and size of their family (if you know!) when making your choices. Or anything for the living and dining areas, really. Bottom line is stand out and show you care, but keep it simple.