So I went to Otakon this year and saw a lot of Minecraft Cosplay; this is surprising since Otakon's an anime and thus you mostly see anime/manga characters. Cosplays from JRPGs like Final Fantasy are pretty common too, but I didn't think Minecraft would be such a hit... Most common were the creepers:
Here are a couple good ones of the player character:
My personal favorite, however, was this guy who was cosplaying as Honeydew from Yogscast: