anecdata but my experience on dating services is Christians, on average, look happy. No idea why. I'm atheist and not interested in dating a Christian because I could not support their beliefs. But, it's uncanny how often the pattern fits. I'm pretty confident, given 100 dating site profile photos, I can, far better than chance, guess which ones are Christian.

Note: I'm not saying Christians are happier than other religions. I live in the USA so there are more Christians than most other religions. I'm also not saying they actually are happier. I'm only saying they appear happier, on average, in their profile photos than the rest of the profiles. I find it very curious.

In my journey to Christianity I have found that as my faith grew my anxiety and depression became much more manageable. This really wasn't intentional on my part but Ive transitioned from a decade+ of actively managing with medication and weekly therapy to no meds and monthly psychotherapy over a few years. Looking back I do credit that to my faith giving me a framework to manage my long list of worries, concerns and fears. The people in my Church community generally are happy even despite dealing with many difficulties. I can't say the same for all the people I know through work or other venues.