For the most part, I feel the same way OP. Games that used to suck me in, such as Battlefield, Left4Dead, Farcry, Assassins Creed, Deus Ex, Sniper Elite, Total War, and countless MMORPG's to name a few. One thing I realise about these games, is that not much changes from game to game, so it doesn't take long before you burn out on them. Now I really only jump on Overwatch a couple of times a week and recently been messing about on From the Depths. I've really been considering taking a break from PC gaming and maybe investing in something like the Nintendo switch for games I feel like I'm missing out on (Never played a Zelda game before!).
For me, the only thing that will get me exited on PC would be another Elder Scrolls, Bioshock, or Fallout game.