Cnet has this article called
When games stop being fun. It's all about how people can become addicted to PC or Console Video games, and how it can cause you to lose your job, fail in school, or destroy your marriage. The article is pretty good... and sometimes funny... I like the following excerpt:
Angie said her live-in boyfriend spends at least 30 hours a week playing "EverQuest" as a female elf--a character choice she finds "weird and disturbing"