My nephews are very into Minecraft, so of course they wanted to go as Minecraft characters for Halloween. Nathan chose to go as a wither and Sam chose to go as a mutant enderman. I spent the better part of week staying up late to build their costumes out of foam core, duct tape, and LEDs. It was totally worth it.
In my totally unbiased opinion, Nathan, Sam, and our friend Isaac (who was dressed as My Hero Zero, lavishly adorned with EL wire) had the best costumes we saw all day.