My rift s has arrived, roll on the 23rd
Great, enjoy it.
Depending on your tastes, try
Elite Dangerous - whole different game in VR, and often quite un-nerving at times.
Project Cars 1 or 2 - Can't begin to say how much different it is driving in VR. In both games you can sit at a PC wheel, and using a d-pad or keys you can move the sitting position to exactly how you are sitting. And the sense of speed is amazing.
If you have a good stomach, you'll soon know after a few goes in VR, then go here and download this.
https://store.steampowered.com/app/1073390/Aircar/
It's totally free, but mind-blowingly stunning, I just can't state how amazing it was. Do it sat down with a controller in your hand, stunning. It's like being in those Bladerunner police hover cars.
No Man's Sky - In a much much better state now, than the release version, and is stunning in VR. The sense of scale is incredible.
Boneworks - You will need a good strong stomach for this, I know a few people who last for a few minutes before puking. Me, I love it, and am not affected by the motion. Just make sure you can't smash any nearby objects or TVs because it's sooooo easy to forget where you are.
Pinball FX2 VR - Can't begin to describe what it's like to actually stand next to a huge virtual pinball machine. And things fly around your vision, and you want to pick them out of the air.
Space Pirate Trainer VR - It's a kind of space shooter where you are stood on a ship hanger shooting at moving robots. It can get a bit repetitive, but it's such a blast - excuse the pun.
The Talos Principle VR - If you like puzzle solving in a huge 3D VR area, then you might like this.
The Solus Project - In VR this blew me away. You crash land on some alien planet and have to survive. The sense of scale is amazing, and the weather effects, especially the tornado, is amazing in VR.