This is my Linux desktop. I use GNOME 2; KDE 4 still won't work properly for me (this is like, I don't know, the 5th or 6th hardware configuration I've tried? I've given up), Unity feels like My First UI, and GNOME 3 looks and works like one of those concept cars - it looks great on photos but it has no engine and the interior is made of clay. I'm currently planning a switch to Xfce to future-proof my Linux experience.
I use two operating systems on a daily basis. For anything related to work (90% of my computer time since I only reboot into Linux once I know for sure I'll have no work for at least a few days), I use Windows 7. If you want a screenshot of that, it's basically the same as the Linux one above, except with a Windows 7 taskbar at the bottom. I'm boring like that.
Just for funsies, since I'm using this thing quite often - this is what the desktop on my iPad 2 looks like.
Well - fire away!