n00b sigs?

As i see this is a popular forum for creating sigs etc. so i was just wondering where you think i stand if i am good at making them or not..
I WOULD like feedback positive AND negative to see how i could improve as a graphics designer, here are some i made earlier
ENJOY:

http://addiction.xengaming.co.uk/ado.../Predator2.jpg
http://addiction.xengaming.co.uk/ado.../Predator3.jpg

Cool work.

colouring on the second one needs less contrast but other than that brilliant work rop by www.sgfx.mfhosting.com

thanks for the views and comments
I will register on your forum and post ;)