I would have immediately forgotten that some people on the Internet weren't fond of Diablo III's art direction way back when, but then Blizzard turned the would-be drama into something that the rest of us could laugh about. The joke has gone a step further and materialized into a full-blown secret level.
Between the cupcakes, rainbows, smiley faced clouds, unicorns, and all the colors you could ever want, Whimsyshire sure is a magical place. Instructions on what's needed to reach the level can be found here. And here's an alternate video showing the entrance for good measure. Nicely done, Blizzard.
Diablo III Auction House closing down on June 24 forever and ever, also forever
2:00 AM on 06.19.2014