We seem to be at three players, plus me.  Same house, and indeed same year would make interaction easier, but that would come with a price.  I've mentioned (hopefully) that competitions will be a significant part of the plot, whether it is Quidditch and House Cups, dueling, racing, or a special tournament that will be introduced later on.<br/><br/>I have other plot ideas, but at least one is kind of triggered by the competitions, leaving at most two plot hooks that don't feature a rivalry (even a good-natured one).  Putting all of the players in the same house would take away some of the competition, not to mention forcing a bit of a retcon for shadowranger's character, which could be done pretty easily, but is still a factor.<br/><br/>And lastly, I am not opposed to having a male PC in Ravenclaw, but would hate to see a third character in Ravenclaw while Gryffindor has just one character.