Hi Gem! I am here with some harsh, harsh critique to whip your gallery into shape for promos because that's what you asked for, and I think you're sooooo close, and you have really good chances this time.

(Although I am not an admin and have no say in what they are looking at...

)
Okay! I'm just going to go through one piece at a time and be incredibly nitpicky without pulling any punches, don't take this personal because I'm really just trying to help you get promoted!!!

Let's get going...
BANNERS
If Only You Knew: Super pretty, the woman could be brightened a bit and the text I think would work better on the guy's shoulder (over to the right and up a bit), also it's kind of squished together, increase the tracking/spacing esp. of the first line. The guy needs to be sharpened once, but watch out that his face doesn't get blotchy, he may need his skin smoothed just a bit.
Time Come Back to Me: Really nice, well done, even coloring and good blending. My one concern is what the focal point is; the text is kind of far away from the faces on the left. You sort of have 2 focal points with the two pairings of figures.
Beatrix: Gorgeous.

Nantes: Coloring is quite uneven, with the yellow-brown on the bottom and the more black-and-white on the top. I just don't think this effect works. It might work better if it were a smooth gradient; as it is, it seems blotchy. Also, again you have the focal point problem. All the faces are the same size and brightness, and the text doesn't clearly point to one as the focus.
Brutal Reality: Really nice one, although the edges seem pretty plain. I think you could have done more with the sides, even just to fade out to dark or light would have been something.
Falling: You have the same blocky texture over this as in the previous banner, but I don't think it really works here. The coloring also seems dull and the text like an afterthought. The sides are also unimaginative. This is one of your weaker pieces in my opinion, I'd consider removing it.
Innocence: There is some image overlaid that puts that curved line over the guy's face and on the far right; it just makes the coloring odd and uneven in those parts. Also, the middle is overly bright (I think probably also due to that overlaid image). The text also has that 'Oh I'll just stick it here' feeling to it and I don't think those fonts look good togehter.
Believe: I like this a lot, although the coloring is slightly different on the right, it's more yellow whereas it's more purple on the left. What really brings this banner down for me though is the text. The quote especially doesn't look good, it's too long on one line and all squished together.
SIGNATURES
Bazaar: Very pretty. I really like the text.

Anika James: The birds on the far right pull the balance off. Also, the text is very spread out and further dilutes the focus. This might work better with the name on the right as well, and the quote in another font underneath it.
Cordelia Atwood: There is some image on overlay here again that is messing up the faces. Also, the faces look either blurry or oversmoothed. The text I think should be moved up some, and those fonts again don't work so well together in my opinion. Especially the one for the last name.
ICONS
Nice set, although 4 and 6 look very very similar to each other. 5 is a cut that most people would say to avoid (due to cutting off the chin, makes her look fat).
BLENDS
Cloud out of the book: Beautifully done. The blending and coloring are <3 The focal point problem is evident here too though. The book is so far down, it really pulls the eye down away from the woman. Maybe bringing the woman down a bit, or bringing the book up and shortening the bottom of the cloud, would help. Text as well might bridge that gap between the book and the woman.
Change: Beautiful again. The background woman is a bit too blurry for me, though. Everything else looks really good.
Glittering Eyes: The most gorgeous one! Except for 2 things: There is a blue patch right at the bottom of the flowers that doesn't fit with the rest of the coloring, and the quote text needs to be changed completely. Try all caps maybe, and smaller and closer to the title?
Wires: I think this was squeed.

It's so freaking cool, the only thing I would mention is that I think the text is too far down. Awesome work though.
Okay, and that's you done! So, overall the things I'm seeing are focal point problems and some areas of blending where you are overlaying images that are messing with the quality of the graphic. Like I said, I think you're really close to promotion, but I'd recommend to get rid of your weaker pieces and maybe put in a couple of beautiful new ones in their place.

Good luck!