Welcome, WD! Here's some of my thoughts on your work.
Fox ninja: I kinda like the hyper-saturated blue-on-black for a SciFi ninja kinda look. But the gold highlights on the armor and the distinctly antique style fashion throw it off. I think you were envisioning something like this:
View attachment 43888
....which is really hard to CaS, so don't worry if it doesn't turn out as you like.
Egyptian swamp girl: very interesting. Lovely sticker job on the skirt. Swampy/grungy look. The elaborate Elysium footwear looks out-of-place. Metal ears and wings. No idea how those fit into your Egyptian/Tribal look. The design's utterly lacking in cohesion, but somehow it's refreshingly spontaneous. Good work.
Emerald alt: Aesthetically speaking, it's not unpleasant to the eyes. The sleeves flow out nicely from the Pyrrha shawl, and they complement the long, plain skirt. Splash of black and green on torso adds some layering and color contrast. Like a fantasy priestess/librarian, which is great. But other than that, no stickers and no SpecEq, which is boring. Try swapping out the Pyrrha shirt for something you can deck out yourself with stickers/SpecEq.
Pyrreno: not feeling this one.
Teresea: good foundation. Looks like you're going for a steampunk kinda look with those goggles. Bowler hat + fingerless gloves is very British slums too, so that's working great. A little too much brown and not enough technique. Try layering more clothing, exposing more skin, or experimenting with pocket stickers. You might be able to make a watch fob out of SpecEq with a chain and a bolt. Or throwing in a whole bunch of scrolls w/ newspaper pattern and turning her into some kind of steampunk delivery girl. Then you could throw on some random gears, bowties, or belts. A hundred things you can do with this one.
Overall you've got a fun, quirky style. I'd like to see what you can do once you've acquired some sticker and SpecEq techniques. This thread will get you off to a strong start:
http://8wayrun.com/threads/school-of-cas-advanced-cas-technique.18282/
Good luck!