I don't like challenges for the pure fact that I tend to play mostly in HP games, and while, yes, you have grounds for comparing two applications for, say, Harry, what do you do if the two applicants have two drastically different interpretations of characters who are nothing more, canonically, than a name and a house? It's not fair to the applicants to be compared to another interpretation of the same character, and it's not fair to the mods to have to choose between two very good applications. (Of course, this is assuming that both applications are good, but I prefer to take that stance from the get-go, instead of assuming that one will be good, and the other will be crap.)