Well... I don't like the pictures to much im afraid, just my opinion no offense but I can't do it so your better then me oh and, are you the girl in those pictures?
Your sigs are normally of the same style...not saying I don't like it but maybe trying some new stuff? Just an opinion. I like the brushing on the first one but I'm not too keen on the render, try blending it more with the background. The second one lacks depth, I don't like the colour either. The text animations are nice though.
The first is quite good However the second one is rather dull The text i agree is nice. Maybe the text for the first one should be made more visible
I think they're both nice. A bit dull, I agree, but I really like the text on the second one. I actually prefer your actual sig to both of them it is a bit small, and maybe it would look better if it was a bit bigger, and easier to read