They're interesting. But honestly it stands out too much that you're just splicing images together. On the first the harsh cuts on Guts' boots/Femto's rain don't help, and the second one the brand picture seems randomly placed.
When you're putting these images together you've got to do it more subtly and with greater emphasis on composition.
Very not bad, buddy. I don't know about you folks, but I've built some kind of style using the "fade" option in late versions of Photoshop. Sure the "Variations" option will be useful the same way. But my skills are lame. Please improve your skills, so that you can astonish us with some really kickass pics!
CnC said most of what I would have highlighted. Also, do wallpapers really still come in a 800×600 format these days? I can't remember the last time I saw a user's resolution at that size. Still, the colours work well! If you want to blend images together, I suggest multiplying one of the layers and then erasing the edges with a blurred brush.. this is assuming if you're using Adobe Photoshop, of course.
Don't quit, mate. Practice makes perfect [/cliché]