W.O.W?

From some of my friends, I've heard about "World of Warcraft".
Despite the fact that you have to pay for it (And I generally despise those games),
I've heard it's pretty good. I'm unsure about how many people play
it that are members on this site, because it isn't featured on the
"Games We Play" bar on the main page. So whether you've played it a bit or played it a lot,
I need some help on whether I should play it.

I recently heard from a friend that you can get a reward for jumping off cliffs on WOW. Now that's for people who don't have much to do...