Ah, achievements, that funny little meta-game where everything's made up and the points don't matter. Why, oh why, do we flock to World of Warcraft's achievement system so? Of course, we all look forward to achievements with particularly lucrative rewards (or at least interesting titles), but many of the game's achievements, the only reward to look forward to is achievement points. And while you can certainly take some joy from watching those numbers build up, the points, essentially, don't matter. So what is it that keeps us hungering to complete even the silliest of achievements? Is it a passion for completism that prevents you from leaving these lists undone? Is it a need to prove yourself better or more dedicated than your fellow player? Is it the faint hope that some day Blizzard will reward your tedious labors with appropriately awesome swag? Is it the sense of accomplishment whenever an "achievement complete" alert pops up? Tell us -- what keeps you achieving?