It was either Minecraft or Civ 5. The former is a great time break allowing me to mess around building a house or something.
Civ 5 on the other hand only works on the other half's laptop so I can only play it when I'm around there (luckily I always wake up like 2 hours before her so weekends are great times). She's also got hooked on it so hotseat matches for the win. Although I'm not allowed to invade her nation apparently.