I think the most enjoyable is the free Playroom VR thing that came with it, has a few mini games and people not wearing the headset can join in. Got all the trophies for that!
At the moment I've got these installed:
Rush Of Blood - Good to freak people out, can backfire though as someone ripped my PSVR off their head.
Superhot VR - Wanna pretend you're in the Matrix?
Farpoint - Looks great, plays great with the aim controller, story is average.
Arizona Sunshine - Zombie shooter, it's fairly short and the graphics aren't the best. Bought to give me something else to use the aim controller on.
Keep Talking and Nobody Explodes - Good fun, basically you need to disarm a bomb and people give you instructions from the TV.
Dirt Rally - Can apparently play the whole game in VR, I've not set it up properly with my wheel to put any proper time into it though.
GT Sport - You can only race 1 other car but on any track, recently they've added time trial mode which I can see being good with a wheel. You can do a showroom type mode as well.
Skyrim VR - This was the main thing I was excited about. I've put a few hours into it, but not sure how much of it I'll replay.
I Expect You To Die - Good fun, 5-6 odd missions. Game length will depend on how good you are at figuring them out!
Resident Evil - Played through the campaign last year on the TV so I am focusing on the DLC bits for VR. Plays and looks really good but not put much time into it. Supposed to be one of the best games for it.
Moss - One of my favourites, very nice to look at/immerse yourself in. Gameplay does get repetitive but it's worth a playthrough.
I think the best thing to do is watch some YouTube gameplay/reviews and see which you might fancy.
Personally, after the initial few weeks of trying all the demos and games I fancied mine has barely been touched, maybe averaging once a week. I think the main problem being that come 10pm I've got some time for playing games, but don't want to faff with the headset so end up on normal stuff. When I do bother to set it up though it always amazes me that it's possible to sit in your living room and experience this stuff on a few hundred quids worth of PlayStation bits!
I did fall for the trailer hype on The Inpatient and bought it on release but really didn't enjoy it. A few creepy bits but then it felt like a corridor walking simulator. Luckily I skipped Bravo Team even though I really want a semi realistic shooter. There are a couple of games on the store that I fancy but the majority don't look anything to get excited about.