Alright, I guess I'm gonna give some CC.
Doug: I agree with what RD said - your colors are very light. Darkening them might help. In addition, I feel like the shading on the dress needs to be more prominent - the only shadow at the moment is on the very back of the dress.
Steampowered: It feels a little flat. I think the issue is that the shadows aren't dark enough and the highlights in the outline aren't bright enough. I'm personally not a big fan of the gradual shading - it used to be all I used, but Gen 5 sprites are very crisp in their shading edges from what I've noticed. Also, your light source seems to be a bit inconsistent. On the left half of the sprite, it seems to be coming fro the traditional top left angle. On the right arm, however, it's coming from the top right. Also, her left arm seems a little out of proportion - it's sort of small.
Reptile: I love how willowy you made her! She seems so ghostly. I feel like the lines on the arms make some distinct angles in places where they should curve more, but that may just be personal preference. Maybe more of the dress needs to be in shadow? not too sure. I really really like your flower on top of the head - it looks perfect. Maybe consider lightening up your red? It would make the flower's eyes more prominent and also add more of a contrast to the existing spikes and eyes.
Doran Dragon: I feel like the proportions are sort of skewed. The top half is a lot larger than the dress, which sort of messes with me. I like how much detail you put into the head,but right now it feels disproportionate.
ICC: Actually, your sprite is one of my favorites! I'm absolutely in love with the way you did her arms and how you puffed up her chest. It really does look like a kimono! Your shiny coloration is also fantastic. You did a great job of tweaking the design slightly to make it easier to sprite. I have mixed feelings about the bright white you chose for her kimono part. It looks fantastic, but you might wanna try something more muted - I really love the dead colors Yilx's original artwork has. Oh, if you could make the flower bigger... You have the perfect proportions right now, but if you made it just a tiny bit bigger we could see the eyes better.
Hopefully I didn't post anything out of turn. I'm really excited by all the great sprites in here so far.
I'll hopefully have some edits in later that fix shading issues and make her anatomy a bit more elegant.
EDIT:
There we go. Um, what did I change... I redid the shading on her left arm, made both arms thicker, as per someone's suggestion - forgot who - and added dull highlights in the plant's eyes in order to make the fact that they're eyes more clear. I also made some edits to the hood - making the red spots larger, making outlines more clear... That's about it. I think if no one has any pressing concerns I'm going to move onto the backsprite.