I usually get my wallpapers from
InterfaceLIFT. But sometimes I come across some very nice nature and abstract stuff over at DeviantART.
This is my Mac's desktop:
I run an app called Bartender which lets me hide elements of the menubar so I can shove other things into it without it looking crowded.
Currently I have Living Earth (for weather), CloudApp (to upload images), Yoink (to drag stuff to the side of the screen to use in another app), and Plex (for media stuff).
At the bottom I'm using uBar. It takes up less screen than the dock and I find it overall more useful especially since I can hide things like the lame Wacom app I have to have open just to use my Intuos (it's my trackpad too).
And here's my iPad Mini's:
