1. Automate all the ambient lighting to turn on half an hour before sunset. Bonus points since we have a dog at home and I feel better leaving the lights on for him.
2. When we open the front door which is some 4ft away from our neighbor across, our TV lowers the volume to 5% and dims the living room's lighting. Gives our place a bit more privacy and hopefully doesn't disturb any of our neighbors.
3. When all of our phones have left the house, the security system arms itself. Also disarms when we get home.
4. When the temperature on the second floor gets to 76F, our motorized blackout blinds drop down on the second floor, turns on the air condition, and turns on our lights. This is TOTALLY a gimmick for me.
One thing I wish I could have are air purifiers that remembers its settings after its power cycled - so I can control it with a smart outlet/switch upon a certain PPM level. I know "smart" ones exist, but I actually draw the line there. I try to stick with things that have are Thread-enabled or are from brands that I trust.