Setting up smart home automation

Hi all!

After seeing Johns smart home project and working through some HomeAssistant stuff I’m keen to hear about how others have theirs setup!

What would you say are the most used sensors and what is most useful for you?
Have you dabbled into making your own sensors and what hardware did you use?
Are you using any protocols that arent used commercially much? (LoRa, ESP-NOW, ect).

Very interested to hear back!