I've been playing WoW for something like 4 years now.
I've nursed my characters since level 1 and could not leave them.
When I started I started due to having a unhealthy liking to the Warcraft game series and when the MMORPG came out I thought it was heaven on earth, or at least heaven on windows...
I've had my moments when I've not bothered playing it for a month or so but I've never cancelled subscription (because i pay it by 6 months thereby saving a few bob) but also I have always gone back to it and found that I still find it as fun as when I played it day 1.
You get your chars to max level, you get them geared up and you chat to your lovely guild friends and it makes me feel all warm and fuzzy inside.
For me WoW is a feel good game. Something to escape to when, its more a social network and a game than just another game.
The sense of community (though of course there are many A holes on the game) is extremely fulfilling.
I'm also one of those people who actually enjoy questing, choosing to go different areas, explore the beautiful scenery and follow the story of the game every time I make a new character.
Recently I have also joined an RP server at a friends request. To which at first I was dubious.
However I now love Role Play. I love thinking of back stories and personalities for my character and making it walk around as if its some... hmm... lets take my orc warrior for example.
He walks around pretending to be a war chief, pissing off blood elves as he thinks he is superior just because his axe is bigger than the blood elves overly large genitalia which noticeably dangles from their foreheads.
WoW is an MMORPG... MASSIVELY MULTIPLAYER ONLINE ROLEPLAYING GAME!
All these words are important, you cannot play it alone, that defeats the object of the existance of other players and would be rather dull, roleplaying, because you take a role and hopefully stick to it, and game... because its supposed to be fun!
I hate how people start the game, play 10 levels and go "oh its shit"
It's because you've experienced like 0.00000001% of the games total content.
But yeah, my reason I guess is due to character attachment, sense of community and the immersion in the fantasy world.
The latter being because I have started reading lore on wowwiki and have fallen in love all over again.
Anyway, rant over. This was way longer than intended.
~KC