Incredible color combinations! That's one of the hardest things for me; coming up with color schemes. These each have totally different moods. I think my favorites are both the middle ones. I just love that pink orange and purple, and those white spots and stripes really add something. And the orange and red against the blue an the upper one really make the character pop!
Your alien designs are fantastic as well. So detailed and...well...believable. And they seem pretty original. That leaf-ish formation on the forehead is something I don't think I've seen before. The designs along with the colors you chose remind me of reef fish.