Couple of Car siggs ive done

http://i168.photobucket.com/albums/u...nSkyline-1.jpg

and this one

http://i168.photobucket.com/albums/u.../ShelbyGT2.jpg

hope you like them :)

Rate or comment

http://www.roflcat.com/images/cats/fail.jpg

-12112/10.

^haha rofl XD
tho i also agree

but anyway here's some of things you need to improve,
lighting
rendering
text
and a nice looking border ;D

You also needs working on your bg it just looked like you re-sized a stock image. you have to do more than this to make an incredible sig.