I'm watching Robots in Disguise (2000/2001) and there's this weird detail where some of the Autobots seems to... belong to people?
Like... Optimus is a firetruck... who... goes back to the fire station at the end of the day. He LEAVES if there's Decepticons Predacons, like, he just abandons the fire fighters, but he... he goes BACK.
None of these humans appear to be main characters. This is not Heatwave and Kade, they're not formally brought in on the cybertronian thing as far as I can tell, their fire truck just "gets stolen" periodically.
Anyway, I like to think Optimus enjoys going back to get washed and pampered and take a nap while the humans drive him around and gets annoyed when it's interrupted. I'm only, like, five episodes in, but that's my head canon and I'm sticking to it.













