Well, that's a bit of a loaded question! See, I have my computer set to rotate between over 50 different wallpapers, almost exclusively anime (even more for my lock screen/screensaver! I try to limit each anime to 3), plus the lock screen and wallpaper for my phone! I guess I'll just stuff as much as I can into this card... I'll sort by anime for your convenience! The first one is my main lock screen when my laptop is not plugged in. It's also in the wallpaper rotation, and the panel with Yato and Yukine also serves as my phone lock screen. Since I'm starting with that, I'll just make this first panel Noragami!
Akame Ga Kill!
Attack on Titan
Devil is a Part-Timer
That last one is the back of my phone case
Kill La Kill
My phone wallpaper is a variation on the DTK one