I'm playing Stardew Valley. I'm in a really unproductive time in my life and being able to farm and raise animals is a really good stress reliever. Especially since I can't just go outside and start gardening right now...because winter.
It's really good. Basically a mix between Terraria and FarmVille. There are a ton of hidden features that are really nice when you come across them, and the NPC interactions are more in-depth than I've seen in any other game. Apparently co-op will be released eventually and that'll make it more enjoyable.