I went ahead and spun the Flower-Eating Dragon - which sold before I could even list it in the shop (sometimes people see photo previews of a new yarn on our Facebook page and request a reservation before I get around to listing the yarn in question. Not complaining here! It's the best of compliments :-))
I liked how it turned out. The black viscose gave it a sleek, smooth look, and it felt kind of flowing, very drapey. I decided to experiment more, and I've been carding vegan batts and spinning them into art yarns :-) (unfortunately, the pictures could be better...)
Art Yarn yet to be named
The fibres require a bit more attention and spinning skill than wool does, as they tend to be slippery, and bits of fibre tend to fly around and settle in your eyes and mouth. But all things considered, it's worth the extra effort. After spinning, a yarn has to be washed so the twist can set, and afterwards it's usually much less curly than directly after spinning. That's not the case with artificial fibres, as it seems - the yarns were still rather curly after washing.
I will put these in the shop soon. Please note that they have been spun in the same environment as my other yarns, and the fibres have been blended on the same drum carder. I cleaned it extra thoroughly, but the vegan yarns might still contain traces of wool. Very, very light traces, but I still think I should mention that.