P and O are pretty much completely opposite personalities. I've talked about it before, but sometimes it cracks me up to think about how utterly different they are from one another. O is quick to look at stuff, lose focus, be playful, zoom around, and spook (goofily) at stuff. All of that nonsense is beneath P - she wants to eat, and meander, and NOTHING concerns her outside of that.
Now, I have a photo that perfectly sums up their attitudes towards life.
The girls, in a nutshell: O is very concerned about A Thing over there, and P is, well, not.
That about sums it up perfectly!
I also happened to catch some video of their personalities - O loves to buck, leap, and play, and P just... kind of doesn't care about anything, and doesn't feel the need to ever go faster than a casual saunter.
Mares... what would I do without them!