Well games that i've tried and would recommend:
Beat Saber
Goes without saying really. Probably the best-selling VR game, and it's tons of fun to play.
I Expect You to Die
A Bond themed, escape room simulator with a good sense of humour and lots of style.
Keep Talking and Nobody Explodes
The only real local multi-player game that i've seen. Take turns in defusing the bomb while people not wearing a headset describe the instructions to you. Good party game (in groups of 6 or less please)
Superhot VR
This one just feel really cool to play. Not very long, but pretty re-playable.
Wander
This is the next best thing until they bring Google Earth VR to wireless headsets. You can go anywhere with Google Street View, and it's pretty incredible.
A Fisher-mans Tale
I really enjoyed this. It's a sort of an arty, theatrical game with puzzles and a talking prawn. Got some really cool puzzles that play around with scale that only really works in VR. Not very replayable though, so maybe wait for a sale?