Well for me, these are the reasons why i play MMO (WoW in specific)

-friends play it

-chat to random people

-i like pvp(altough WoW has a mediocre one)

-story

-annoy people

-something to play

the thing about MMO is that the fact that its multiplayer and most MMO are really good if you talk to people but if you just play on your own. most ofthe tme we do some cooperation(not all the time) and its really nice to know that your playing with real people not with some useless NPC. people tries to blackmail WoW but for me i like it because they try to focus their game on the social side(altough theres a lot of people who doesnt talk and just piss you off) and less on pvp side(which is gay but overall i do like wow and even tho WAR is coming out im not really looking forward to it.