stupid question I know but let me explain. I self host only because I love learning random things and this was just another thing that I convinced myself I needed to learn, not out of necessity. I am hosting an *arr media system right now but that is pretty much the only thing I actually need, I have unlimited google photos so I don’t need Immich, I am happy with bitwarden so I don’t need vaultwarden, don’t need home assistant, nextcloud, bookstack etc so what I should I self host? throw any idea you have at me.
If you do this as a learning experiment, then I’d suggest you self host even those you don’t need and see if you can get to a quality of service similar to those services you pay for.