Hmm, this may not be received too happily, but I'd say the looks of the cosplayer: how similar their appearance to the character (facial structure, height, figure) is/how attactive people perceive them to be etc.
That doesn't mean that I think something like that should be a requirement at all, though.
And of course also a certain devotion to the costume, details, posing, props and make up.
| Japan Festival Berlin | Leipzig Book Fair | ChisaiiCon |
~ ♥ ~
| Uta - 85%| Final Haikyuu Qest!Tooru Oikawa - 85%|
| Jinpachi Toudou -80%| Sho Hinakawa - 55%|
~ ♥ ~
| Tumblr | deviantART | WorldCosplay | Cure |