It's beautiful! Only comment I have is that your description seems to be flawed - you have credit for the "Pinkie Pie Vector". If I'm not mistaken this is a Fluttershy wallpaper, and I'd like to grab that vector of her.
I can't draw characters though. I can only make wallpapers with characters that are already made by other artists. If you can find a vector of Rarity with a mustache, I can try to put it into a wallpaper if I can, but I cannot make the character itself.