@Marqueecioe: Since you posted so damn many creations, I'll give mini-reviews for each one.
Apprentice M: Very nice spin on the original. The best part is definitely the combination of red ball + butterfly sticker. Adds alotta detail and looks surprisingly natural. I've always been a huge fan of technique combos, and you've nailed it. The belt is slightly awkward looking since they kinda jut out into space, but you might easily fix it by replacing them with some horns. Oh, and great bump-mapping (with pocket stickers and what not). That shit's a lost art nowadays.
F. Apprentic M: Same as above.
Breaker: great combination with the sphere and feathers of strength. I like how you carefully lodged the ball in the groove between the two pieces for maximum effect. Very cool how you cut out the yellow cross shape on the skirt with the pocket stickers. Great balance of red and yellow overall, with purple highlight. Cool decal on the cape too, another great sticker combo. Not particularly close to the original, but he is pretty cool.
Dark B: Same as above....
but darker.
Cassy: Simple, but effective. You kept the original blue/white/pink scheme of the original while MILF-ing it up with the Ivy suit. A pretty convincing depiction of matured Cassy. One problem. Those shoulder pads are ginormous. If possible, you'll want to balance out the lower end by giving her some massive waist and/or leg equipment. For some reason I really like the bow behind the ponytail look. Kawaii as shit.
Tally G: Interesting concept. Incomplete, but lotsa good ideas here. The lower half is spectacular.
Really cool how you patterned the pants and cut them off with the pocket stickers. Pattern + sticker = awesome. The top half, however, is a bit too plain, since the bottom half really seems to be weighing down the design. You'll either need to add some clothing layers (like a cropped jacket or some shit) or put a shit ton o' detail on the top half to balance it out. Excellent idea with the hat ornaments. Another great SpecEq combo. Unfortunately, they just aren't enough to balance with the bottom. Instead of randomly sticking some feathers of strength on the hat, try using some horns or shells to extend the hat horizontally (which also helps balance the profile). Then you can dongle those earring thingies on the ends of the horns for maximum effect. Also, great color balance.
The Takster: Really nice, simple design. Love the kimono pattern, and how you kinda frosted the ends of the sleeves by using the gradient pattern. A subtle effect, but really classy. I like how you evenly distributed the light armor around limbs to preserve balance and add detail too. Looks like she might need a necklace or something to distract the eye from that vast expanse of raw skin though. Rather than just tossing on some earrings, try using your SpecEq and stickers to create a unique necklace. Not exactly in tune with her character, but it's a very lovely, soft, and feminine design. Might go well as a Japanese Pyrrha or something. My favorite of this group.
XiangTheMustang: Doin' her thang. Jk. I like the costume. Again, a soft gradient pattern helps the design flow. And I like how the gold accents cut swiftly into this gentle flow. Creates a nice little contrast to the design. Combined with the shawl, she makes for quite an elegant, mature XH. I really don't like that hair though. Try adding some bangs with the pirate horns/crescent moons or something. Maybe even combine with some black stickers to carve out a unique hairstyle.
Overall, I see a tremendous amount of promise in you. I see that your technique is advanced and that you have a knack for original costumes. Very precise with your SpecEq too, like what you did for Breaker's hat. Attention to detail is always a plus. Some of the most dynamic CaS I've seen in a while. Take a look around, make yourself comfortable. You might find something you like. I highly recommend this thread as an overview for CaS techniques:
http://8wayrun.com/threads/school-of-cas-advanced-cas-technique.18282/
Or you can participate in the contests, which you can find here:
http://8wayrun.com/threads/most-esteemed-one-shot-contest-thread.15703/page-48
Anyways, best of luck, mate. I expect wonderful things from you.