I am getting the same feeling. I tried playing Minecraft, I tried playing Blockland, I tried playing Sims 3, I tried Skyrim, Dishonored (which I never even finished) and yet... nothing.
Everything just feels like a chore rather than actually being fun. Maybe because I have no friends to play games with, I mean I have friends but they don't play the same games I do.
I have 120~ games and I just stare at it like "Nope. None of these are appealing."