if you worked on the contrast/depth itd be very nice, atm not really feeling it though however it can work very well
Really like the colours but the depth needs more work, like the others said The lighting is pretty good but maybe use the brun tool on some of the more left parts.
I like the concept of the 2nd one which was the first one posted but the render/stock used just seems weird because of the placement. For the first I like the bg and the placement of the girl and some of the effect's used on the left but the right side effects just seem way to random.
thanks for the comment. Yea I agree when you said that the effects are random. Still working on the composition of these pieces. Added another one.