Sharing the screen shot you vectored would be nice. Before full viewing, the wall looks ok, but once I full viewed I can see that it's pretty poor quality. Most of your black outlines are jagged, which is weird since you vectored it. Those sunlight blob things are very odd looking, because they're too sharp, so they just look like paint blobs at the moment. Maybe blurring them a bit will give them the look you were going for.

Get rid of the butterflies, they do not compliment the wallpaper at all. Less complex/realistic looking butterflies would probably be your best bet, and only maybe 1 or 2.

That tree trunk on the right, is really jagged in places as well, why don't you try smoothing it a little with the smudge tool?

Lastly, did you make the background yourself? It seems like it's a screencap you just filtered excessively which made it blurry.

Good luck with my advice.

The background looks like a filtered screencap, and that's my main gripe. :S

Thaaanx *_* i was thinking of vectoring this image myself too :3 it was so idillic ^^ godfather and the child XP aaaaawh :33
+fav