Don't get into a habit of loving rears, unless you want to go to Hollywood school for stunt riders. Rearing is probably THE most dangerous bad habit a horse can have. I am not saying that Cheyenne has a habit of rearing. But to me, it is not something to be taken lightly.
You should not be thinking "did I do a good job of riding through that rear?" (which you did, btw) , but "how can I avoid that ever happening again?"
You need to start feeling for when your horse is at the place where she simply cannot contain herself anymore , because if you try to bottle her up tighter in a situation like that, and expect her to stand still, then she is going to go the only direction open to her , and that;s UP!
Instead of expecting her to stand still when it's obvious that she is just too pent up to do that, let her move, but make it moving to what you ask her to do. Like moving in a small circle. This will help her to stay more relaxed and you might even keep her mentally more "with" you if you can change these circles fro one direction to the other. But holding her back if she is that excited is asking for a rear, and as cute as some folks make it sound, it is not to be taken lightly.