My instructor always wants us very parallel to the long side throughout the HP, and has me ride forward in SI if we start getting to diagonal with the shoulders leading. This works fine for us to the left, A's hollow side, but to the right, I couldn't get it at all until I started thinking of riding a renvers on the diagonal to really ensure that the haunches were coming along (renvers is proving to work better for me than travers because then I'm not blocked by the invisible fence at the shoulder, apparently

Anway, I've also heard that some trainers develop HP from riding on a diagonal line, and then slowly developing the bend, so the shoulders would be leading quite a bit for quite a while. I tried this with A and it worked on her hollow side, but allowed the haunches to trail even more on the stiff side. I'm just wondering how common this approach is, or if trainers tend to use a blended approach depending on the horse? I've been watching some of the Festival of Champions rides and it almost looks like there is a split. In the GP special, I was surprised that several horses were more at an angle to the long side in HP, and coincidentally, those seemed like they didn't have enough bend in the body. Curious what everyone here does/thinks on the subject.