Not directly related to MoR, but whatever. I recently joined a massive HP roleplay forum and what i noticed among the players was a huge deal of optimisation by proxy. Basically the general sentiment is that being sorted into one house means that you have no traits from the others. This makes some sense, because a wizard employer will probably look at the candidates' house affiliation first. I'll need to reread some of the books, to check if it's canon, but in the fans' minds at least, all of Magical Britain is aligning itself to an arbitrary division. It's a bit disturbing, really.