When board games (and video games) are reviewed or critiqued, its "replayability factor" is often one of the core elements that is brought up.It makes sense. After all, if you lay down $50 for a game, you're going to want to play it more than once, or it becomes one expensive hobby. And of course, you want it to be fun every time you play it. Otherwise what's the point?
But what is it that makes something replayable?