In this day and age, simply far too many video games are released. This good and bad.
This is good because: Many options! Get bored with one great game? Jump into another!
This is bad because: If you are the least bit fickle, you'll be overcome by the plethora of choices you have. You'll always have a feeling of missing out on something. You face the Paradox of Choice situation:
Since 2010 I've been massing a collection of games on Steam through the various sales (even though the game I mostly play is SC2.) If I stopped adding to this pile of games, I think at the rate I'm going I'll be done around 2017 or so, which has finally convinced me to stop buying stuff just cause it's cheap. I mean I can literally play Dark Souls for hundreds and hundreds of hours, and I feel the only reason I won't do it (it's still up in the air for me whether or not I'll try multiple play-throughs after I finish my first) is to superficially jump to something else. And I feel that becoming obsessed with a game and playing it through and through (like so many people are doing with Dark Souls) is the best way to experience a game.
I guess the only way to resolve this is to be ABSOLUTELY discriminating and allow yourself to only buy one game every few months...