I am mostly old school right now.
iPhone - Drop7, I had never really played this, but someone suggested I try it, as I was getting bored with 3s. My eyes are going, and don't like to pull out my glasses to play a game on the subway or standing in line for something. So these types of games are all I play on the iPhone any more.
iPad - Star Realms obsessively. Patchwork, thanks to the Decathlon introducing it to me. FF Exevus - I had played it just briefly when it came out, but I only have room for one Gacha type game. This has filled that hole since I stopped playing Gems of War.
Mac/PC - We finally got the fall update for Civ6 on the Mac side, so been playing that. I could have played on Bootcamp, but the partition is not that big, so I manage space carefully. I have been playing my way though FF XIII on Bootcamp as I had never played it. I am not a huge fan of the ATB system, but I do like the story so far. About half way through it right now.
Switch - We still only have Mario Kart 8, Just Dance and Pokken Tournament. Actually we have Jackbox Party 3 also, that I got just for a dinner party we had a couple weeks ago, and it was a huge hit.