How many hours a day do you spend playing wold of warcraft? How old are you? Does it affect your personal life?

I am a college student doing a paper on different aspect of the game World of Warcraft. One aspect is the addictiveness of the game. I can’t find any studies or surveys that have sources so i have decided to do one on my own. Any additional information you would like to add will be helpful. Thank you.
I’m not saying anything negative about the game. I play it myself. The paper isn’t about the negative effects of the game. It is just simply fact.