Like others mentioned, Subnautica, No Man's Sky, and Skyrim are fun in VR, but not made for it. No Man's Sky, though, almost feels like it was. Also Hellblade: Senua's Sacrifice is really good in VR (and spooky). For "VR-First" games, obviously Beat Saber, but also found Thrill of the Fight (Boxing) fun and a great workout. On PC/Steam, many of the Steam Home places are very cool.
NMS is my Zen game. I have over 500 hours in it just in the last two years. I know the game is not for everybody. I have friends who don't understand why I hop through the galaxies, explore systems, hunt for ships, play the expeditions, and build base after base after base, even though so much can feel repetitive for some. But for me, it became my new Minecraft - "one more brick". I love the expansive feel of it, and find the isolation relaxing. If i want to see others i can hop over to the Anomaly or hit the community build areas. I cannot wait to see what Hello Games has come up with.