What's the best VR game you ever played?

[HoloDust]

Half-Life: Alyx, but that's PC exclusive.

I would definitely suggest something lighter to ease you in at first, either Moss 1/2 if you're OK with diorama alike puzzle platformer (some folks, like my son, don't recognize this as "proper" VR experience, since it's not first person) or something like Arizona Sunshine for some fun FPS zombie brain blasting (this is what I used to showcase VR to newcomers back in days).