My objection to hippogryphs is not that they are trendy. Nor is it that they are hopelessly nonaerodynamic: an eaglehorse makes just as much sense as an eaglelion, after all. What bugs me is that they are so hard to make visually plausible. There's a lot of room for interpretation with your standard gryphon, really. Lion legs and torsos can be shortened or lengthened, slimmed down or decorated in ways that blend them with an aquiline foreportion. Eagle heads can be broadened and bulked up, and still look basically gryphonic.A hippogryph doesn't allow that kind of leeway. It's an eaglehorse, nothing more or less. And you just can't distort a horse; if the proportions are a teensey bit off, it doesn't look equine any more. So all the distortion has to take place in the fore, to make the eagle legs work with the horse-legs, and AAIIIIEEEEE! Logistic nightmare. No wonder I'm obsessing.