This might sound weird, but I say World of Warcraft. It's very dated, even when compared to Star Wars Galaxy which came out in the same year 2004. Characters on SWG had a larger polygon count and tonnes more customisation options, more in line with the Sims 2 which also came out in 2004. I lost interest in WoW partially because of that reason and also for being somewhat alienated in the expansions. If Blizzard re-did Vanilla WoW in today's graphics, then I'm sold. Then instead of expansions, roll out more instances in the vacant parts of the world map like how ZG and Naxx etc got rolled out.