We meet every Tuesday, there are cookies :)
https://www.newyorker.com/magazine/2020/01/13/a-world-withou...
I'm a little different, while I am occasionally happy at inappropriate moments, serious events affecting people really bring me down, like your average person. The death of someone close to me, for example, affected me very deeply and made me sad for a good while. But with the exception of that, I typically feel quite happy. Anything that's "just money" or "just stuff" usually won't shake me, for example I stayed in a pretty upbeat mood during the theft of most of my most valuable possessions in one go.
Personally, I would say whatever it is has had an extremely positive impact on my life. Aside from the huge benefit of just being happy, there's also the benefit of being more trusting (I accept random traveling strangers into my home via Couchsurfing) and doing all kinds of things I think I'd have skipped if I was more risk averse. And I've had some fun with the side effect of (to quote the New Yorker) seeming slightly baked.
Might be fun to make a social network of just those who have it: personally, I find that to a degree, I kind of have to hide my happiness and general contentment at life in order to not seem like an asshole to those around me struggling with various things. It'd be nice to have a place where that's not a concern. Perhaps we should all set up a Mastodon or something?