To answer a game with a lot of content after 3-4 month, Rift. Rift put out more content in a shorter period of time than any MMO of this genre, to date. For the most part, Rift continues to do this at rates that make other games, WoW included, look like they are perpetually stagnant. Having said that, I don't care for the game lore, visuals, or a lot of the game play. SWTOR could have been great.. but they went and mucked that up reaaaaal good with terrrrrbile, blisteringly bad class balances and PVE/PVE loot systems.. not to mentioned bugged bosses for months on end and severe lack of content after 4 months. I hear that game is getting better though, so feel free to head over there if you want to try something else.. their space combat pvp is pretty cool I hear. /shrug