Rhythm games are definitely the “killer app” for me at least. Especially with Beat Saber the community mods have kept it fresh.

Others prefer synth riders or pistol whip.

There are some other single player experiences that one of my friends gushes about. Boneworks, Monstrum, Red Matter, Vertigo 2.

Multiplayer, is another thing that simply SHINES if you can get a group together. Echo Arena, Ready or Not, Dungeons of Eternity.

Some I haven’t played but which I want to are System Shock VR, Stride, Rumble, Underdogs, Into Black.