I used to have the most horrible addiction to Ragnarok Online. Some days during the summer I used to play for 15 hours or more. I played for five years--from my senior year in high school until I finished college, on more private servers than I have digits for. Then I finally got a job and a boyfriend, and realized it was much better to devote my time and energy to volunteering and taking care of my lovely fish, than to deal with e-drama and farming items to kill all my friends with. :>
In conclusion, kids, stay away from MMOs. They will steal your soul.