I think the most insidious aspect of video games is that they are a success surrogate. I spent over a decade and a half playing games after dropping out of high school at age 16. What kept me going was the feeling of success and accomplishment I got from impressing my online friends in games.
Now in my mid-30s, I'm an undergrad in mathematics and finally putting my life back together. I've come to realize that video games are a terrible substitute for real life accomplishments and that online gaming friendships pale in comparison to building relationships with real people, in person.