Oh man, Hetalia in its prime was horrible. The last Hetalia cosplay I wore was Nomad/Barbarian Hungary. At every photoshoot I went with this costume I got stared at and questioned about if it was a real character or not. I had a couple of people tell me that this costume wasn't in Hetalia. (O_o WTF? The creator drew the concept himself. How is it not part of Hetalia?)
Also the fact that if you are not cosplaying any of the Allied or Axis characters with the exceptions of Prussia and Holy Roman Empire, you were completely ignored in photo shoots.