Wowies, the colours here are great! It really matches the Kenshin scan really well! The scan looks really well extracted and with high quality. Also, the background has some really great effects with the swirls and the grudge-like texture. I agree with SpiRaLfLuX that the typography stands out too much but also I think it's the type of font too. Overall, it's a really awesome wallpaper! Great work! Keep it up!

The background looks really, really busy, and it has lots of colors. It's probably just my screen, but it hurts my eyes. x____x As for the text, I think you should make the black line a bit thinner. And try playing around with the blending modes for the big "Rurouni Kenshin" text on the background. I don't know if you already did that, but it currently looks like you just lowered their opacities. Same thing with the petals, try playing around with the blending modes, instead of it being just plain white. Blending modes are your friend. Use them. :)

Also, did you get the Kenshin PSD from http://www.tekuteku.org/ ? If you did, you might want to give them some credit.

Lastly, congratulations for making a detailed wallpaper at a small size. Some people here don't know how to compress their files. I'm happy that you do.