I played wow for several years, and after leveling a few characters high, and making a lot of lowies i just realised that it sucked in my opinion. once you started playing pvp you really notice how bad people are, i got taunted by people for trying to protect battlefield objectives instead of going off and fighting mindlessly, which is what was the nail in the coffin for me, none of my friends play it any more, because there are maybe enough intelligent people on each server to fill a raid group at max level, if your really lucky.
the reason a lot of people play it in my opinion is that there, either the small group of people who are actually nice friendly intelligent people who hang out with other people like them and don't get the constant abuse from everyone else, or there everyone else. i loved wow before it got really big, but then the grinding got boring, the gear and classes all looked the same, and as more and more people showed up more and more of the nice folk just left for other mmos. which is what i find weird, pne of my firends still has an active account because he has two eighties with good gear and he might sell 'em, but he hates playing as well now, and he thought it was gods gift to gamers up till a few weeks ago, when he got reported for trolling because he killed some guy who just respawned right beside him while he was gold farming.
however though it make other mmos more fun, as they have very small populations of trollers and other people like that, WAR for example has many better pvp and quest features than WoW but people won't play it because they can't get to level twenty with a few hours of work, so obviously it's not worth it.
generally though most of the people who like wow, are jsut not fun people to play with unless your like them, which makes appealing to, well people like them, ioh and the fourteen day trial should drop you at sixty, no one would notice you being unable to play, you'd be like the vast majority of people, also not all fourteen year olds can't play the game, just most of them, thats like saying all thirty year olds can play well and be mature about the game