Why is world of warcraft so successful?
noodle: it appealed to both hardcore and casual gamers, and at least for a while, was successful in that respect.  it didn't require the latest and greatest gaming rig to run it and enjoy it.  there is a huge social aspect to it, which i think luckily coincided with the development of solid VOIP technology to make it more than just text-based communications.  it came from an established company with a guaranteed fanbase -- it didn't have to build itself up from the ground level.i used to play.