Generally speaking, Rio is ridiculously obedient. He does not like to get in trouble ever. Granted, ever since his near death experience, his manners are a little less than perfect due to him being completely spoiled. But still, he's generally a very good boy. That said, he has this one weird thing which has only been a thing since after he was sick.
|"Don't listen to mom, I'm perfect in every way" -Rio probably|
After you've ridden (or lunged or whatever work was that day) you have to start on the right side and work around. Every so often he'll actually let you do all the feet from that side after riding, but not usually. I think that's more of a balance thing for him though.
I think this is like horsey OCD. You know how you learn to do everything equally when you're riding? Like work both directions more or less for the same amount of time, and all that? (Obviously unless you're having a one sided issue, but this isn't a training post, stop being picky.) I think it's his version of unwinding the clock. He figures you made a circle around him to the left before riding, so after riding you have to circle right. Fair enough Rio. Whatever you want!
I wouldn't think horses could have opinions like this, but here we are... Does your horse do anything weird like that? Any weird habits of your own you want to share?