I've played WoW and I really do like it, but I don't think I'm anywhere near the point of addiction. I haven't even paid for it in almost a month. It's a great game, but I don't play it all the time really and I take a fair amount of time in between each month sometimes. Although when I do have it paid for and can actually play it, I could play for a couple hours at a time. And I know paying a certain amount each month can get a little ridiculous, but I guess if you enjoy the game and want to keep playing, you kind of have to... I guess that's how they make money.
I definitely can see people being addicted to it. One of the guys I used to work with played it ALL the time. When he was in college and played it, he would intentionally skip all his classes, just so he could play WoW. I think that's a tad bit extreme just to be able to play the game all day. Anywho, I guess that's all I have to say.