There have been a few studies that have shown the benefits of playing video games for many children and even adults with ADD/ADHD. But always in moderation. Many of the same studies have also shown that excessive video game playing can be detrimental to those same people. And they definitely don't support playing video games 20hrs a day and believing you yourself are actually a character from these games, or that there is a parallel reality where fictional characters from games and media are real. Any mental health professional (or anyone who isn't nucking futs, really) can tell you that kind of belief and lifestyle is totally bat-shit loony toons.