For a year and a half, I was sickly addicted to WoW. I ran a large raiding guild (for those not in the know, that meant running a rigid schedule, several times a week to kill the same bosses over and over, with 40 players, several hours a night). Running a large raiding guild is practically a full-time job (I averaged about 30 hours a week in-game, not counting time spent on the guild forums discussing policy whatnot), and it takes some managerial skills to keep the guild morale up and ultimately keep the epic loot rolling in.<p>As another user here noted, the progression in that type of world is very deterministic, and very measurable. You have stats that you can work to increase, knowing that eventually, it will increase. There is absolutely zero risk. If you die, you waste a few minutes, and try again. Eventually, you'll get it. That feeling of constant progression keeps people coming back. It's an invigorating feeling of accomplishment, and as soon as you've got your next item, you're pumped and salivating for that next item.<p>At the time, I hated my job and WoW was my escape. I was a consultant programmer who had simply gotten addicted hard (I always had a browser tab open to wowhead.com, even while working at clients). The only fun I had programming related at the time, was time I spent working on my guild's website (and I spent a lot of time on it), occassionally working on a startup I was doing on the site, unrelated to WoW stuff.<p>It wasn't until over a year into WoW, that I realized that the website I had built for my guild was actually very functional, beyond most other guild site I'd ever seen. So I spent half a year making it generic and started selling guild sites based on the framework of my original guild site. I launched three years ago and for 2.5 years, it's been my exclusive job.<p>My point? That occasionally, it pays off to waste your time in an artificial world, enough so to fully understand the target domain such that you can create a marketable product/service for it.<p>But for the most part, almost anyone I know that quits WoW improves their life in doing so. Myself, I don't play WoW anymore, haven't for a while (I just lost the interest, in realizing it's a neverending grind for no <i>real</i> payout).