here with your critique! :)

set one: gorgeous colouring! its so beautiful :wub: mm okay, maybe move the girl on the left, over a bit to the left? so shes still behind her, just leaning out more. the text needs to stand out a bit more. right now it kinda fades into the graphics too much and i didnt even notice it at first. maybe just have it in that open spot in the middle of those two flowers next to the fan. the font doesnt really suit it either. just play around with some fonts and it should get there :)

set two: first of all - theres a book (i think?) down the bottom of the girl on a low opacity and it kinda interrupts the whole flow of the graphics. maybe just get rid of it or try and make it flow more? mm the text is too small to fill up that space. maybe make it a bit bigger, and add some tracking to the top line so it spreads out the whole space of the second word? again though, fantastic colouring! :D

banner one: ooh very nice! maybe add some contrast or make the colours a bit stronger to make it more striking. i think itll give it that feel of completeness (i dont think thats a word :P )

banner two: move the text towards the girl on the right a bit more, and down a bit. move the quote down a tad, and resize the left girl so shes a tiny bit bigger, but not too much though! mm i think the penname might just look better in the corner.

banner three: the balance is slightly off on this one. theres just so much on the left side, but nothing really on the right except the text. maybe try making the people on the left a little more subtle, and then on the right maybe put some stock of a painting or something? and make it slightly stand out a bit more than the people on the left (but only a tiny bit!) move the coloured person to the right a tad and then move the text towards her a bit. this just creates a combined focal point, yeah? :)

banner four: up the contrast a tad, not too much that you lose the softness of the colouring though. i think the girl has a slight halo around her hair. it might be intentional because its fairly obvious but its quote distracting. also i think this was part of the original picture maybe, but you see how her right arm seems to be cut off? just at the bottom right theres like a brown line or something. fix that if you can. text placement is great, but the font and stuff doesnt really flow. I don't really know if the emphasis should be on the "one" maybe on the words 'little' and the word 'one' might look better. the penname probably looks better in a corner. beacuse at first i thought it was a short quote just shoved there :P (unless it is a quote.. haha)

banner five: i think it might look better without the second girl on the left there. it kinda throws off the balance a bit. text needs to stand out a bit more. maybe a black or dark drop shadow or something? quote is hard to read and the penname might look better in the corner. just play around with the placement of the quote. :)

banner six: move the text up and left a bit. so its closer to luna. combined focal point again, :) i reckon draco could be a bit bigger. so hes from like chest up? the colouring on this banner doesnt flow as well as your other banners.

chapter image one: colouring is gorgeous but the text needs a lot of work. the placement should be nearer the bird. maybe try adding a shortish quote in that brown space, and chapter two should be all caps with tracking maybe under the title?

chapter image two: wow fantastic colouring! maybe just try and make her stand out a tiny bit more, and the top line of the text as well.

chapter image three: scrap it, i know you can do better.

overall: your placement is actually really good! :P ummm, work on balance, and making the right things stand out more. try and always have a combined focal point, just so the eye isnt being drawn to all sides of the banner at once. your colouring style is AMAZING, so keep it up! :D