Some game types seem pretty equal to me (i.e. Farmville, Say the Same Thing, etc.) In making this reply I did a little research and found an article which claims that men experience stronger feelings of reward in games that involve gaining territory and aggression. ( <a href="http://med.stanford.edu/news_releases/2008/february/videobrain.html">http://med.stanford.edu/news_releases/2008/february/videobrain.html</a> ) I believe Ingress is highly territory-based, thus causing men