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Minimalist and Linux noob, but also a masochist so I installed Arch.
(sh.itjust.works)
Submit screenshots of all your *NIX desktops, themes, and nifty configurations, or submit anything else that will make themers happy. Maybe a server running on an Amiga, or a Thinkpad signed by Bjarne Stroustrup? Show the world how pretty your computer can be!
Plasma used to be bloated, but now is very similar to XFCE in terms of resources, and if you don't use Akonadi or Baloo, you get something even more minimal.