Fantastic Contraption looks stupid, but it's really a lot of fun and very challenging. Have you given that one a chance? You probably have it bundled with the Vive. Call of the Starseed: The Gallery is a relatively polished looking game, but is fairly short (episode 1). That was both a great experience and a decent puzzle game. Vanishing Realms has been my friends' favorite so far, as we've all played through it and are once more waiting for the next chapter.
My Rift just arrived back at home, so I'll be giving that a try. I'm looking forward to Chronos and a better Elite: Dangerous experience.
Fantastic Contraption is great as a concept. Played it for a few hours but it looks like Teletubbie-land. Make it a Leonardo da Vinci death-contraption game set in a deep political 15th century background simulation with accurate physics and photorealistic graphics and I'm sold.
Not too fond of stylized japanese green cats leaving pink farts in a dumbed down version of smurf-vilage, but I guess Steam and Facebook analysts found out that's just me.