most of your signatures lack depth
you try to use light to do that but in turn it makes things have more or less attention then they should
you consistently use bad text which leave the eye to rest at making the art behind it useless
flow is there but it's messy and i dislike it
the only okay-ish one was this
but still the picture seems too bright all-around and you have your name in a horrible spot
next time i suggest going with the contours of things to give depth and making sure that abstract backgrounds aren't overpowering your center