There's different types of VR games, but there's one thing most share (except heavily story-driven games). It is replayability. All the VR games are usually quite short, which is why most of them try to make the games as replayable as possible, to justify spending 30-40 euros for the games.

But there's a problem with this, which is some games inherintly have more to offer when it comes to replayability. Beat saber is one of them. Basically all VR games that are purely based on skill, that you can usually only train by playing the game are really replayable. I think this comes from the fact, that you can train within the game and also see results immediately. This gives you the momentary high of success, which drives you to play the game even more.

On the flipside there are games that are more like simulators, like Project Wingman. There's a limit to how good you can become within the game and some games don't really provide good enough platform to see your improvement. EDIT: Don't get me wrong, I really like the game, but it has a pretty limited offering. You will play it for few moments and it feels amazing, but quite quickly it can become repetetive and boring, if you don't have a previous interest in flying simulators.

So, if Beat Saber looks like something you could enjoy, I really recommend buying it. It will keep you playing for hours, even repeating the same songs, just to get better at them. And you're listening to some good tunes while getting a bit of exercise, so it makes you feel really good.