I don't understand cosplay, I have no desire to cosplay, but I have nothing against those who do cosplay. If they have fun doing it, and if it's their way of socializing, then go for it! I'm not bothered by cosplayers in the slightest. I will say however that I would like to see more original cosplay. Everytime there's a covention, you'll see the same old character costumes: Link, Dante, Snake, Master Chief, ect. What about really obscure characters? Like NPCs or Items or hell, even effects!
I know, I know, some people do dress up as bit characters. I'd like to see more. Thousands of people dress up as link, but few dress up as that most noble of video-game objects, the Tetris Long Block. Or the Red Shell.