I’ve fallen deep into the home automation rabbit hole the past few weeks. 

Some things I’ve set up:

- lights turn on when entering a room (via motion detectors) and off when exiting
- adaptive lighting adjusts light brightness/color based on time of day 
- home security arms & all electronics turn off when asleep, based on iPhone focus mode/charging/time of day

Home Assistant is extremely powerful (but rocky UX at times)

cma.xyz. Founder /paragraph, ceo /mirror, previously at Google & Coinbase 

home automation is deeply addicting!   

my start came in late 2017 for a small pet project (pardon the pun) after i wanted to turn on my backyard deck lights when the dog went out.   the light switch is outside on my deck, so i used a multipurpose sensor on my sliding glass door to turn on my new zwave light switch.    after that, i filled out my entire house with light switches, motion detectors, and in limited areas, bulbs.

i still use smartthings as i found home assistant too buggy for daily use.   
-if you have fans, check out bond it's fantastic for getting them automated if they don't have a single light switch 
-i also use actiontiles for a great ui on my old ipad (only for smartthings)