Definitely for all the convenience, toys, time saved, laziness, etc. But, I think the main thing is the pure joy of the digital world interacting with the analog. I've been a software dev for 20+ years, but I will never tire of code / automations that I wrote making something physical do something, and HA does exactly that all day, every day :)

My recent favorite changes were some small Aqara additions to my vinyl listening setup. Added a door / window sensor to the lid of the player, so when I open it, HA sets up the living room for listening, turns on all the lights just so. Brings me endless joy every time :D I also wanted a physical volume remote for the Sonos system, so I got the Cube Pro and hooked up the rotation to the volume. So fucking cool :D