I'm a hardcore Gundam Seed fan, and I can't complain with Gundam... but I we'll see about wallpapers.

I really love the dynamic feeling you gave the wallpaper with Strike Freedom in that position, however you also gave the Gundam too much "visual personification". It almost looks like the Gundam is half human.

Also, the explosion effects are just too plain. It may be Gundam and it may be a wallpaper, but those look really cheap... sorry I had to be flat out honest. Try adding some details on the inner circle of the explosions.

Nice wallpaper overall though. Don't let my critique get you down.