I go through phases like this, but I've found that it's more about the type of games I'm playing. If I'm not in the mood for high-stress, I'm not going to be playing Ninja Gaiden NES or Doom II on Ultra-Violence.
And as others have said, a lot of games aren't really meant to be fun anymore. They're just meant to trigger that "I'll play one more round" impulse to keep you playing the same damn thing for hours/days/weeks on end. So if this is your problem, try playing something that has an actual start and end.
And as others have said, a lot of games aren't really meant to be fun anymore. They're just meant to trigger that "I'll play one more round" impulse to keep you playing the same damn thing for hours/days/weeks on end. So if this is your problem, try playing something that has an actual start and end.