Nextcloud.
I was hosting nextcloud at home for years. Then when I worked in a Datacenter I got to host some servers there from free so I set up a two-node proxmox with nextcloud and some other stuff. Now I don't work there anymore and I really felt the hole nextcloud left, no more notes syncing for notes, tasks, calendar, podcasts no more place to upload my photos from my phone ... So now I'm hosting nextcloud at home again.
I also host jellyfin which is nice but if I don't have it doesn't actively hamper my workflow.
Damn! That's definitely a "I'm old" moment for me. I still remember when I first heard about the concept and I remember setting it up the first time on a self hosted project (which seemed harder back then).
Awesome project!