I think forcing yourself to do anything is never going to end good! Well I do agree that certain moods can affect the type of game you play, I also disagree with it. I know a lot of people who play comptetive shooters to decompress after a long day.
Personally speaking, I love the ME series, It's my pick me up game when my depression is acting up, but I also find the overall ending of the series depressing. I guess it just all depends on the individual!
Good post, btw!
RE: The humor of the games