I love CC, without these orange balls she would be sexier imo. Lulu has lotta effects but he looks not bad, though I think you could make him way better. D:
maybe the first one would be better if you made the bubbles little bit smaller, and for the second one .. am not sure .. there is red C4D and its not nice erase it and it will looks much better ... ask usuall .. you use effects that no one knows how to do it >.>
You should simplify more your effects because your sigs contain so many effects in the same time which eliminate the importance of The FP ( Focal Point ) it needs more depth and color 's balance ! work more on your brushes though ( the colorful spots ) Good luck