My recommendations:
Walkabout Minigolf - No real excuse not to own this. Unless you're a heathen who finds no joy in the magic that is minigolf.
Real Fishing VR - I was skeptical about this as someone who isn't into real fishing, but it has a bit more of an arcade feel than I expected, and I dig it. You grind XP and money to buy new gear and unlock new fishing spots. There's two main zones to fish in (with 20 levels per zone), different fishing styles, cosmetics, etc. Great game to listen to a podcast to, or you can open a browser in game and watch a movie/YouTube/etc.
Beat Saber - It's arguably the most iconic VR game, and it's a ton of fun. If you aren't into music games in ANY capacity, you can avoid it. But if you've ever played Guitar Hero/Rock Band/DDR/Bemani stuff at all and had any amount of a good time, you owe it to yourself to buy it. Or at least try the demo.
ForeVR Bowl - It's like Wii Bowling, but better.
In Death: Unchained - This is my "serious gamer" suggestion. It's got the best archery in VR, and it's incredibly rewarding (but difficult). If you like Soulsborne stuff, Binding of Isaac, that sort of thing...It's worth checking this out. My most played VR game hands down.