For the wierd headcanon thing, how about Rattrap?
What they smell like: BAD. Probably the scent that lingers at the bottom of a garbage in the street.
How they sleep (sleeping position, schedule, etc): Curled up in Beast Mode. Probably similar in robot mode. Rattrap’s a twitchy sleeper. Light, too. Not many can sneak up on him. He’s also one of those that catches sleep by napping a bit during the day because he goes several nights without a wink do to his stuff (personal, ordered or shady).
What music they enjoy: for some reason, I see Rattrap liking 80s rock like Queen or Def Leppard. Anything that rocks well but has a bit of a chill to it.
How much time they spend getting ready every morning: Rattrap just rolls out of berth.
Their favorite thing to collect: Waspinator parts.
Left or right-handed: I’m pretty sure he’s a righty.
Religion (if any): Rattrap is a pragmatist to the core so he’s utterly and completely atheist.
Favorite sport: I could see him liking baseball.He does have a nice swing and throw.
Favorite touristy thing to do when traveling (museums, local food, sightseeing, etc): Food. Obviously. Though bar-hopping isn’t far behind. I could also see Rattrap enjoying a nice gig once in a while.
Favorite kind of weather: When it’s not too hot, not too cold, not too dry, not too wet.
A weird/obscure fear they have: Rattrap is afraid to get anything in his optics for fear of becoming blind.
The carnival/arcade game they always win without fail: Anything that involves shooting. He’s a skilled marksman after all!