My parents stood a son of Doc Bar for a few years during the latter part of Juniper’s life; Doc’s Juniper. https://www.allbreedpedigree.com/docs+juniper
He went back to Three Bars three times on his papers. I would not call any of our horses by this stud an 8th as opinionated as my current PITA bay warmblood mare! We had about 3-5 foals by him every year for 5 or 6 years and they were all really lovely horses. Including my heart horse who died at my farm a couple years ago a month or two after he turned 29. Some went on to be ranch horses, some showed in QH breed shows, many were cutters or reiners. My dad was a Three Bars aficionado so we had many and them being opinionated like you’re describing doesn’t stand out in my mind. I’ve also been perplexed by the “red mare” stereotype in the English world. We had oodles of red mares with Doc Bar bloodlines and they were amazing mares and none were difficult.
@axl I’d be curious to know your horse’s other lines? The QH lines I have found to be opinionated/challenging were Hancock and Peppy horses. If I had the funds to clone a few of the horses I had as a kid, I’d do it in a heartbeat bc I’m too lazy to make an effort to relearn the modern QH bloodlines!