"Just bide your time, man. You'll be roasting marshmallows off of her neck by nightfall."
No, Seriously ...
When World of Warcraft first came out, it was pretty basic. You did quests and killed monsters for experience points and gold. As a side option, you could pick a couple of professions to level up, just like any other RPG you've ever seen. That was about it, but the thing is, doing either of those required immense amounts of time, literally on par with a part-time job. To progress, you virtually had to marry the goddamn thing. "Thanks for the invitation, but I can't hang out this weekend. I have a raid, and if I miss it, you know how WoW gets. If you don't spend enough time with it, it gets all bitchy and starts withholding the good loot."
Over time, the relationship gets stale because you're just doing the same old shit. So you either call it quits or you grit your teeth and fight through it because the idea of finding another game to fuck is just mentally exhausting. And then one day you log in to find that it's gotten a boob job and lets you do anal. Wait, I think I got my analogies crossed somewhere. Doesn't matter, you still get the point, right?
Something about fucking Night Elves, right? No?
Every time you start to settle into a boring routine, Blizzard adds something to reboner your gamedick. Gear, areas, dungeons, minigames, decorations, achievements, holiday events, player versus player (PvP) games, festivals, special storyline scenarios ... just a motherfucking massive amount of content, constantly rolling out to break up the monotony, including changing the way the game itself is played.