Right Cricman, I know it's hard when you don't get comments but sometimes this is a signal to make something way out of your depth and try something really extravagant to catch people's attention
so don't worry about it. The Watson one isn't bad and the bg is pretty good mate. However, the australian badge looks out of size and try to only use the sparkle brush when it is appropriate, to grab someone's attention. The text is pretty nice but perhaps too embossed. Also, one key thing for you to work on is the areas that are just left with the bg. With this try to solve it by making you sig smaller. i tend to do my sigs at 375x125 so that it can easily be resized to pc regulations as well. As for the flintoff one it is a good idea and the text is very good but try to use only one render in your sig(usuall) as it can become the focus point of the sig and everyting else in the sig can revolve around it. So don't worry about comments mate, even though I will try to comment as often as possible
. Also, how about trying something completly new with the bg. how about smudging your render a bit on the bg with a chalk brush scattered and set the layer to colour dodge and then filter>>sharpen. Just something to try, try to make the most of the programs filters and smudging as they can add a lot more to your sig both in terms of colour and depth. Also, make the most of adjustment layers such as gradient maps, curve and colour balance. They will add something extra to your sigs.
Hope all this helped mate...