Also, working physical interfaces for everything where possible.

Lights that come on auto-magically are great, low light after bed time, that shuts itself off after you stumble back to bed, etc.

But you also need to allow overrides, like someone double taps the lights on you override the automations for an hour or two to handle corner cases like when your 6 year old pukes all over the hall and bathroom and you need cleaning light not stumbling light.

Also, light switches and lamps should work like light switches and lamps for guests, because these interfaces aren't bad, they work, well even.