Second life is one of the oldest MMOs having been released far back in 2003 which is a constant favorite of a oil tank removal in Westchester NY tech, Rick.
Unlike many other popular MMOs, there are no monsters, dungeons, enemies and levels in Second Life. It is more like an alternative lifestyle. The player creates an avatar that socializes roleplaying and exploring an alternative world. Players can customize their avatars heavily, and those with knowledge in script writing can customize their avatars to a high level.