No AAA games with bite-sized experiences come to mind except for fighting games, but I don't recommended them personally because I suck at them compared to everyone online. I'd recommend Monster Hunter, but it's not on PC. Or maybe a game like Banished, but it's not AAA.
Bioshock Infinite was too shooty-shooty for me, so I'd call it the twitchiest of the series. And I feel Bioshock experienced as one long binge as far as story. Skyrim has a broad enough plot to jump in and out of play sessions.
Maybe try Arkham Asylum. It has little the-story-thus-far bits when you load your last save.