Get an Oculus if that's your only/most affordable serious PC VR option, either the original set with a 3rd sensor for 360 degree VR or the newer S. I'd say Oculus have an equal amount of worthwhile exclusives as PSVR, you just don't hear of them from the console centric media of today. Games like Lone Echo (and hopefully the coming Stormland) are VR showcases second to none and other smaller productions like Journey of the Gods are more than worth playing as well. Of course they're fully playable with other PC VR sets as well thanks to fan software like Revive (but they're mostly only great with a Valve Index, or at least its controllers, which match the Oculus Touch layout far more closely than the Vive wands). Overall there are tons more PC VR games than there are PSVR games while some like SUPERHOT VR, Apex Constuct and Space Junkies might be available on PSVR as well but they play far better with the 1:1 hand tracking and 360 degree VR most PC VR kits offer making them almost completely different experiences. You're right in that many VR games are short (or multiplayer focused like all the PVP FPS like Contractors VR & Echo Combat), but I wouldn't say they are 15 minute casual gaming breaks, they can be normal meaty serious games, it's just that the single player aspects often only last for 5 or 10 hours rather than 20 or 100 hours as in some of the larger console games. There are also lots of rogue-lites you can play longer or all the arena/wave games like Blade & Sorcery that are fun for a long time if you find yourself investing in their simulations or simply end up liking them enough to do that. And all the potentially longer VR-compatible cockpit based non-VR games like Dirt Rally 1 & 2 or Elite Dangerous and End Space.
Definitely don't get VR just for NMS though and definitely get accustomed to VR inner workings and common control schemes before delving in such a game to avoid problems. If you get an Oculus their First Contact tutorial will get you sorted, otherwise free games/demos like The Lab will do.
www.oculus.com
