Mmmmm....I love the Alraune and Mandragora. A note - I'd probably give a slight curve to the leaves supporting the chest and with the lower leaf on the mandragora, curving the belt as well as it gives a nice feeling of roundness to the figure.

I think you've capture the head on the cyclops and ettin perfectly and both figures feel solid and believable. With the Jabberwocky and the other long armed green homonculi, it feels like there's something...missing. Not really sure what it is but the arms need a little something extra to them.

You've also given a lot of thought to the story of each one - are you working from a setting you have planned out in your head or is each one done "as is"?