Here are screenshots of the desktops I am currently running on each of my computers:

Desktop – Super Mario:

Fedora – KDE 5:

2017:

Laptop – Koopa Troopa

Linux Mint Debian Edition – XFCE

2015:

KVM VM – Blargg

Fedora Rawhide – KDE 5

2015:

KVM VM – Lemmy Koopa

Windows 10

2016:

KVM VM – RedYoshi

Fedora 24 – i3

Netbook – Kuribo

Fedora – KDE 5

2015:

Living Room – BlueYoshi

Fedora – Gnome 3:

2015

Desktop – Bowser

Windows 10:

2015