General comments a gogo.
So, nearly all of your pieces, (all of the first post, and the top two of the second) have either low quality focals, or they are smothered beyond recognition. Not sure what the deal is with those sprite pieces, but the sprites are quite low quality, and honestly spoil the rest of the tag. grahacopy.png This one has the best blending and the best use of the sprite, but the effects let it down, and it really just lacks appeal besides the colour palette which is really good and the use of brightness.
That said, chachongcopy.png this is the best you've posted. The colours are a bit dorky, and the black and white doesn't quite cut it, but a few gradient maps to town down the magenta (not the box, keep that really vibrant) will do this tag a world of good. Especially the face, which is not a pleasant colour for skin. xD I also would get rid of the magenta gradient on the circle shapes to the right. Keep them solid yellow like the left side, or solid magenta even, but not gradient.
The focal needs a tiny bit of a sharpen as well. And you've got some weird blurry / low quality effects on the left side in the space area which could be erased completely.
cavelorcopy.png
This has the most potential, but currently doesn't meet the cut. The whole thing needs a good sharpen, especially the focal. You need to flip the lighting to directly above the stock to match the lighting included on the stock. You need perhaps a few more effects, or textures or something to make the empty space in the bottom left and top right a little less empty. That or tone down the contrast so it isn't so black, but I like the contrast, so add the effects is what I think.
Could go with some dodge tool over the highlights on the girls face as well. Would make it pop a little more.