I agree, not too fond of the rider. I really want to like the dragon, and it's mostly good... but the spines kind of ruin it for me. They are too small, dagger-like, and spaced too far apart. If they were a continuous (or near continuous) row, or bigger, had a wider base, or were some sort of continuous ridge or crest. Honestly, I think that it wouldn't be too difficult to convert it anyway. Just my opinion.
And spearing of unasked-for opinions, I sort of agree with Timbor about the sculpts. I don't think many of the sculpts are amazing, most are decent in my opinion. They're fairly plain, which I usually prefer to the style of figures that are loaded up with way too many details (skullz, jems, hour glasses, random objects stamped with your ruler's initials...) I think the painting is really great on most of the figures, which is what really makes them stand out. That and the tits & BDSM gear. And giant, physics defying headgear.