Nice collection Byakuya! I agree with what Halibel said regarding the negative space on the left side of your most recent sig though. Another option you could try is blending the purple over a bit more, then also moving the text to the left. Make the font white and experiment with different layer settings such as overlay, soft light etc, therefore as the color of the bg changes so does the text. Just an idea
Love the CC sig!

Though I think you could have spruced up the text a bit, you used the c4d nicely. It helps give it more depth and flow.