The very first post is 10 of some of the more highly regarded titles exclusive to PC. You just gotta find some shyt you like and play it. Performance is one great aspect of PC gaming, but the biggest PC titles aren't graphical powerhouses, proof being that CSGO, Dota 2, League of Legends and World of Warcraft are incredibly profitable and popular games despite coming out YEARS ago. When it comes to crazy graphical powerhouse games, they're usually multi-plat games being played at better settings than consoles.
Go browse the early access section and peep what kind of games people are making. If you have GTAV, download FiveM and play in some wild GTA modded servers(or role-play if you're into that). Like racersPick up some shyt like H1Z1, Rust or Player Unknown. There are literally thousands of titles you can't find anywhere else. Steam itself is a damn near endless abyss of very different games waiting to be discovered. You can go the indy route and pick up a super deep Diablo-esque dungeon crawler like Path of Exile(free as fukk), something that tells a story and isn't gameplay driven like Firewatch, a crazily refined and well put together puzzle game like Inside(if you played Limbo you'd enjoy it), if you like building shyt check out Cities Skylines or Factorio. I'm a fan of Divinity Original Sin, and they've got the sequel available for early access and I've been able to check out that game and play it ahead of its official release. I've seen a lot of people talk about games like Oxygen Not Included and Miscreated. I have no idea what they are about but I see streamers on Twitch and people on my Steam playing them a decent bit. Do some quick Googles and peep game bruh. Games can come out of nowhere and become huge hits on PC because the marketplace is so vast and diverse while remaining easily accessible.
The choice is 1000% yours. Not mine or any other posters.