Enough big plates/side plates/bowls/cutlery/glasses for the occupancy. Depressing I need to say that.
Building on that, decent kitchen equipment. As above, knives that cut. Corkscrew. Cheese grater/colander/decent sized pans. A range of glasses is good. If you’re aiming for the family market, a set of basic plastic plates and cups.
Instructions for appliances if they are anything but utterly foolproof. Also tips on any locks that might be a pain, including windows.
Cotton sheets, not nylon ones that have gone bobbly. Pillows that aren’t lumpy.
Lamps next to the bed. Bath plugs that work. Shower heads that aren’t dribbling and leaky.
A starter loo roll in the loo! An amazing place would have washing up liquid, a few dishwasher tablets (if applicable) and hand soap.
Always grateful for basic local information - not just tourist attractions but standard amenities.
Properly clean. Not rugs and carpets that made me shudder if I’m sitting on them playing a game!