Looking for a single player game to sink some time into.

Title pretty much says it. I'm looking for a good single player game to get into that i can play for a bunch of hours. I'm a fan of tons of different types of games except FPS, I can only really play those with friends for short stints. RPG, JRPG, Turn based games, Stealth, Simulators, Strategy, Sandbox & Openworld.

Any suggestions?