I tryed making a siggy but failed. Anyone got suggestions on wht I should've changed?

Ok so basically... Im not used to 3d images. >.<
As you can tell by my siggy, My 2d image skills are way better.
This was my first try using a 3d image.
I was either going to use this render:
https://thelifestream.net/wp-content/...n-complete.png
Or this one
[IMG]https://i23.photobucke*****m/albums/b388/Ninetales240/Cloud.png[/IMG]
I Picked the first one and used a metallic background
[IMG]https://i358.photobucke*****m/albums/oo28/GinryuStargazer/Silver/background.jpg[/IMG]
I used a black gradient and added some blue flame effects cause of his lighting.
Then I added Final Fantasy Style Text.
This was the result:
[IMG]https://bl*****s.storage.live.com/y1pMCKu2arnR8wc4U44bt38CVfoCKm8XVNjobFu8dgBFQ75nF-wMGkhBYv2hwYUu6ieC_r_fH7KyN4/Untitled-1.jpg?psid=1[/IMG]
Ive gotten some bad ratings on it already so...
Im just wondering what i should do differently when i use a 3d render.
Anyone got suggestions, tuts, ideas for me?