From an artists perspective I must say:
The eyes get no rest when looking at that picture. My eyes were constantly jumping between the Dremora and the human (not to mention the Oblivion symbol) as if I was watching a game of ping pong. What the Oblivion symbol
did do though, was creating a centre of interest in the middle seeing as it was in a lot brighter colors than the rest of the picture, which kind of countered the "ping-pong-effect".
But those logos somewhat annoy me.
From a more personal perspective though:
I love the Good vs Evil theme, clich? as it may seem. I've always had a fascination for that eternal struggle, especially between angels and demons.
And there's no denying it was well done, since it was made with such a crappy program.
But would I use it as a wallpaper? No. As Septiego said, I too want cleanliness on my desktop, and there's simply too much... "going on" (as my old art teacher would say) in that picture.
8/10 for the picture itself though.