Turn based strategy is great fot his. Civ games, XCOM games, Wasteland, Divintiy - that sort of stuff. Many a time have i sat down to eat dinner and play one of those while eating. Can't do that with too many games.
As for listening to other things then game audio, it has to be something somewhat mindless like Diablo 3, Marvel Heroes or Warframe. That sort of stuff. Grindy kind of games, where some decent background music ease the grind a little. Stuff like Souls with great ambient sound and great boss fight music and most other games with a narrative to follow, will be game audio all the way