Reddexodus due to them killing 3rd-party apps in a month. I'm weaning myself off reddit, as I don't think I could go cold turkey.
This place seems much nicer, inherently built to mitigate a lot of what I grew to hate about reddit-- namely the various bigotries, disinformation, and, well, the Nazis. And, frankly, I'm tired of the corporate-owned social media sites (even though Reddit managed to skirt that designation for a very long time), and the idea of FOSS, federated social media that's inherently better-moderated by people with zero tolerance for hateful people really does appeal to me.
So, I'm here checking the place out, and we'll see how it goes and how it grows!