Cities Skylines, Empire Total War, and Assetto Corsa have been my go-to games this past year. Assetto Corsa will be my main game focus for a while....
I don't have a lot of time for gaming anymore being a small business owner with a wife and kid....
but 2-3 times a week I'll stay up late playing...
On CS - this game has unlimited playability and the Steam Workshop is the biggest one of any game I've seen with user made content. It's not for everybody but it is the best city builder type game out right now and you can make some crazy cities with the mods available.....
Empire Total War - this game has been panned by Total War fans for as long as I can remember but in my opinion is the funnest one of the bunch. The scale is overwhelming at times but it does make for some challenging gameplay. I play the DarthMod which makes the game a little more challenging, while not making it overbearing. So this is a Turn-based world domination strategy game, that features RTS battles land battles, a ship-to-ship combat mode, and you have to leverage citizen happiness and knowledge to avoid revolutions etc etc.....
Assetto Corsa - driving sim. Not just a driving sim, but the Sim that brought back the Genre after years and years of monopoly by Grand Turismo. It is extremely good, if limited by the amount of tracks/cars that come vanilla. when I say extremely good I mean it. fast loading times, very stable frame rates, simple UIs, laser-scanned trackes (milimetric fidelity to real tracks) and a very active and helpful mod community that came about before Steam was a thing, meaning there is a ton of information online for the noobs like me... right now you will be hard pressed to find a better race sim for PC (in my opinion)