I can recommend:
Castle Must be Mine -
http://store.steampowered.com/app/542770/Castle_Must_Be_Mine/ - AMAZING tower defence type of game. Really, I didn't think it'd be so much fun. While I don't usually get early access games, this one is already fully playable, all they do now is add more levels. Can't recommend this enough.
Cloudlands Minigolf -
http://store.steampowered.com/app/425720/Cloudlands__VR_Minigolf/ - not much to say - mini golf, lots of fun!
Cowbots and Aliens -
http://store.steampowered.com/app/517670/Cowbots_and_Aliens/ - comic-style multiplayer shooter. Funny and entertaning. Grab any item and throw it at your opponent, hide behind tables, barrels, window shutters (as in physically crouch or lean). Lots of fun!
Holo Ball -
http://store.steampowered.com/app/457320/HoloBall/ - basically, single player Pong in VR. I treat this as my daily workout, it can get you VERY sweaty and the AI snarky remarks makes you want to kick his bottom

Pinball FX2 -
http://store.steampowered.com/app/547590/Pinball_FX2_VR/- very well made game. Technically you can play it seated, but have you ever seen seated pinball?
Sairento VR -
http://store.steampowered.com/app/555880/Sairento_VR/ - Another Early Acccess I've invested in and didn't regret it one bit. You're basically a cyber-ninja. Use guns and katanas, jump in slow-mo, decimating your enemies from the air... Intense and fun!
Now the below are more "experiences", but still fun!
Allumette -
http://store.steampowered.com/app/460850/Allumette/ - An interpretation of H.C. Andersen's fairy tale "The Little Match Girl". Beautiful animated movie that shows you what you can achieve in VR with right filming techniques. Love it! The kids will love it too!
The VR museum of fine art -
http://store.steampowered.com/app/515020/The_VR_Museum_of_Fine_Art/ - I love art - and this allowed me to see Mona Lisa up close

Love it!
A night cafe -
http://store.steampowered.com/app/482390/The_Night_Cafe_A_VR_Tribute_to_Vincent_Van_Gogh/ - tribute to Van Gogh
Destinations VR -
https://www.rockpapershotgun.com/2017/02/03/destinations-vr-review/ - I don't really care about that one, but it has one AWESOME feature - a bit of virtual Mars, composed entirely of the photos sent by the Curiosity rover. This had my jaw on the floor. I was stood in my living room, thinking to my self, "Man, I am in my living room, but I am on MARS. On a different PLANET and it's REAL!". Seriously. Get it just for that short experience. What a time to be alive!