Ravius over at Kill Ten Rats ruminates on the importance of reputation in these very social games that we're playing with each other, and it resonated with me in terms of a few different things going on in World of Warcraft right now. We've talked lots before about ninjas and how that back-and-forth works -- in that case, karma is directly driven by what other people think of you, and of course that's seen more weakly in lots of other places around the game, including guild recruitment, your friends list, and just the general server at large.
Ravius talks mostly about the negative reputations we earn, and certainly that's a powerful motivator for a lot of people. But positive reputation is also a strong force in this game -- I'm interested to see how we deal with earning and keeping positive reputation in the new Dungeon Finder and eventually the Battle.net system. Gone may be the days when you build up a good reputation by saying "remember me if you need a good DPS" at the end of a run. It'll be interesting to see what methods we replace that one with.