Ooh, I like the Forest Spirit! Looks great, the tight cropping makes the portrait look quite intense and it really works. Nice job on the penguin too! I always enjoy seeing WIP pics. ^^
I also like your concept for the raven girl. She reminds me of the characters I used to draw when I first got into anime & manga.
It actually makes me sad that I don't seem to have as much creativity anymore...
Nowadays I mainly stick to animals, established fantasy creatures, and ponies.