OK, my first screenshot thread entry ever. As you can see I'm not into customization of the UI that much
This my custom LMDE GNOME Shell install tracking sid. Started with a Debian 6.0.3 Live console install updated to sid repos with the Mint LMDE repos added. Installed debian-system-adjustments and mintsystem from the LMDE repo to Mintify it a bit. MDM is the display manager.
I snatched mint-themes and inxi from the Maya repo. mint-themes looks better on GS 3.4.2 than my patched mint-x-themes from the LMDE repo. I like the newer inxi too, it displays some more info than the original LMDE version.
Emerald City wallpaper from deviantart. Recent Documents and Start Button extensions from extensions.gnome.org.