My comment wasn't really meant to look bad, you've made really nice signatures but this one just doesn't look right in a way.
What I mean by not flowing is that the last layer just takes over the whole signature, leaving the original colours almost completely out.
Maybe try lowering the last colouring layer's opacity, should come out alot better ^^
The colours you used in your current sig are alot better! Nice flow in them and they don't change the way the signature look that much.
I really like your current signature alot
I choose the red one tho, looks alot better than the green one.