I'd be interested to hear how these dimensions (weight, age, happiness) would score if the extremely broad category of 'gamer' were broken down along favorite genre or at least along the core/casual/MMO subgroups. Are mostly-FPS players more or less content with their lives than MMO players or Peggle addicts? Do their predilections for certain types of games correlate to other life patterns which could better account for their relative happiness or physical health? For my part, I'm 35, in good shape, and very happy with my life. Games have been my major entertainment activity for my entire life, and I follow the industry like mad when I'm not playing. I'm right in the center of the age and interest demographic; why am I not overweight and depressed? Because I have other interests. I would imagine that sports gamers are more likely to engage in physical activity when they don't have a gamepad in their hands, and it would be interesting to know if serious WoW players are seeking community because they have poor social lives, or are rather embracing community because they're naturally more happy and social people. This broad-brush study, and its similarly broad-brush conclusions, aren't particularly enlightening or interesting, but the subject certainly is.